Holarctis

Holarctis is the largest Floristic Kingdom of the world. It contains most of the Northern Hemisphere. Holarctis is situated in Europe, large part of Asia and North America, also in northern margin of Africa. So Holarctis includes all non-tropical areas of the Northern Hemisphere.
The Floristic Regions of Holarctis:

• Circumarctic
• Euro-Siberian
• Mediterranean
• Macaronesian
• Central-Western Asian
• Sino-Japanese
• North American

Holarctis is the largest Floristic Kingdom of the world, but it doesn´t mean also botanically richest. We can find only about 40 endemic families in this wide area.

• ABIES ALBA Mill. – Silver Fir
• ACHILLEA ALPINA L. – Siberian Yarrow, Chinese Yarrow
• ACONITUM ANTHORA L. – Yellow Monkshood
• ACONITUM NAPELLUS L. – Monkshood, Venus‘ Chariot
• ACONITUM PLICATUM Rchb. – Monkshood
• ADENOSTYLES ALLIARIAE (Gouan) Kerner
• ADENOSTYLES LEUCOPHYLLA (Willd.) Rchb.
• ADONIS AESTIVALIS L. – Summer Pheasant’s Eye
• ADONIS ANNUA L. – Autumn Pheasant’s Eye, Blooddrops
• ADONIS VERNALIS L. – Spring Pheasant’s Eye
• AEONIUM GLANDULOSUM (Ait.) Webb et Berthel. – Disc Houseleek, Saucer Plant
• AEONIUM HAWORTHII Webb et Berthel. – Haworth’s Aeonium
• AEONIUM SIMSII (Sweet) Stearn
• AEONIUM TABULIFORME (Haw.) Webb et Berthel.
• AGASTACHE FOENICULUM (Pursh) Kuntze – Giant Hyssop, Blue Giant-Hyssop
• AGAVE CHRYSANTHA Peebles – Goldenflower Century Plant, Golden-flowered Agave
• AGOSERIS GLAUCA (Pursh) Raf. – Pale False-dandelion, Prairie Agoseris, Short-beaked Agoseris
• AGROSTEMMA GITHAGO L. – Corn Cockle
• AICHRYSON LAXUM (Haw.) Bramwell
• AIZOON CANARIENSE L. – Canarian Aizoon, Purslane-leaved Aizoon
• AJUGA PYRAMIDALIS L. – Pyramid Bugle
• ALISMA PLANTAGO-AQUATICA L. – Common Water-plantain
• ALKANNA TINCTORIA (L.) Tausch – Dyer’s Alkanet, Dyer’s Bugloss, Spanish Bugloss
• ALLIUM FLAVUM L. – Fragrant Yellow Allium, Yellow Onion
• ALLIUM PARADOXUM (M. Bieb.) G. Don – Few-Flowered Garlic, Few-Flowered Leek
• ALLIUM SENESCENS subsp. MONTANUM (Fries) Holub – Mountain Garlic
• ALLIUM TEXTILE A. Nelson et J. F. Macbr. – Prairie Onion, Textile Onion
• ALLIUM URSINUM L. – Ramsons
• ALLOTROPA VIRGATA Torr. et A. Gray – Candycane, Sugarstick
• ALNUS INCANA subsp. TENUIFOLIA (Nutt.) Breitung – Mountain Alder
• AMERORCHIS ROTUNDIFOLIA (Banks ex Pursh) Hultén – Round-leaved Orchid or Orchis, Small Round-leaved Orchid
• ANACAMPTIS PYRAMIDALIS (L.) L. C. Rich. – Pyramidal Orchid
• ANCHUSA AEGYPTIACA (L.) A. DC. – Egyptian Alkanet
• ANCHUSA AZUREA Mill. – Italian Alkanet
• ANCHUSA STRIGOSA Banks et Sol. – Prickly Alkanet
• ANCHUSA UNDULATA subsp. HYBRIDA (Ten.) Cout. – Undulate Alkanet
• ANDROSACE HAUSMANNII Leyb.
• ANDROSACE LEHMANNIANA Spreng. – Sweet-flowered Rockjasmine, Sweet-flowered Androsace
• ANDROSACE MAXIMA L. – Annual Androsace, Greater Rockjasmine
• ANDROSACE SEPTENTRIONALIS L. – Pygmyflower Rockjasmine, Candelabra Plant
• ANDROSACE TAPETE Maxim.
• ANEMONE APENNINA L. – Blue Anemone
• ANEMONE BALDENSIS L.
• ANEMONE BLANDA Schott et Kotschy – Balkan Anemone
• ANEMONE CANADENSIS L. – Canada Anemone, Round-headed Anemone, Meadow Anemone
• ANEMONE DRUMMONDII S. Watson – Drummond’s Anemone, Drummond’s Windflower
• ANEMONE HORTENSIS L. – Broad Leaved Anemone
• ANEMONE MULTIFIDA Poir. – Cut-leaved Anemone, Windflower
• ANEMONE NARCISSIFLORA L. – Narcissus Anemone
• ANEMONE NEMOROSA L. – Wood Anemone, Windflower
• ANEMONE PARVIFLORA Michx. – Small Wood Anemone, Northern Anemone, Small-flowered Anemone
• ANEMOPSIS CALIFORNICA (Nutt.) Hook. et Arn. – Yerba Mansa, Apache-beads
• ANTENNARIA DIOICA (L.) Gaertner – Stoloniferous Pussytoes, Mountain Everlasting
• ANTENNARIA PARVIFOLIA Nutt. – Small-leaved Pussytoes, Small-leaved Everlasting, Nuttall’s Pussytoes
• ANTENNARIA PULCHERRIMA (Hook.) Greene – Showy Pussytoes, Handsome Pussytoes
• ANTHEMIS TRICOLOR Boiss. – Three-coloured Chamomile
• ANTHYLLIS LEMANNIANA Lowe – Madeira Kidney-vetch
• ANTHYLLIS TETRAPHYLLA L. – Bladder Vetch
• AQUILEGIA BREVISTYLA Hook. – Blue Columbine, Smallflower Columbine
• ARABIS ALPINA L. – Alpine Rockcress
• ARABIS GLABRA (L.) Bernh. – Tower Mustard
• ARABIS PURPUREA Sibth. et Sm. – Purple Rock-cress
• ARALIA NUDICAULIS L. – Wild Sarsaparilla, False Sarsaparilla, Shot Bush, Small Spikenard, Wild Liquorice, Rabbit Root
• ARCTANTHEMUM ARCTICUM (L.) Tzvelev – Arctic Daisy, Arctic Chrysanthemum
• ARENARIA GRANDIFLORA L. – Sandwort
• ARGEMONE PLEIACANTHA Greene – Southwestern Pricklypoppy, Bluestem Pricklepoppy, Prickly Poppy
• ARISTOLOCHIA CLEMATITIS L. – Birthwort
• ARMERIA MADERENSIS Lowe – Madeira Thrift
• ARNEBIA EUCHROMA (Royle) I. M. Johnst.
• ARNICA ANGUSTIFOLIA subsp. TOMENTOSA (J. M. Macoun) G. W. Douglas et Ruyle-Dougl. – Narrowleaf Arnica
• ARNICA CHAMISSONIS Less. – Chamisso Arnica, Leafy Arnica
• ARNICA CORDIFOLIA Hook. – Heartleaf Arnica
• ARNICA MONTANA L. – Mountain Arnica
• ARTEMISIA FRIGIDA Willd. – Pasture Sage, Pasture Sagewort
• ASARUM EUROPAEUM – Asarabacca
• ASARUM MAGNIFICUM Tsiang ex C. Y. Cheng et C. S. Yang
• ASCLEPIAS SYRIACA L. – Common Milkweed
• ASPERUGO PROCUMBENS L. – German-madwort
• ASPHODELUS RAMOSUS L. – Branched Asphodel
• ASPLENIUM RUTA-MURARIA L. – Wall Rue
• ASPLENIUM SEPTENTRIONALE (L.) Hoffm. – Forked Spleenwort
• ASTER ALPINUS L. – Alpine Aster
• ASTRAGALUS AGRESTIS Douglas ex G. Don – Purple Milkvetch, Field Milkvetch, Meadow Milkvetch, Purple Loco
• ASTRAGALUS ALPINUS L. – Alpine Milkvetch
• ASTRAGALUS AMERICANUS (Hook.) M. E. Jones – American Milkvetch
• ASTRAGALUS AUSTRALIS (L.) Lam. – Indian Milkvetch
• ASTRAGALUS CRASSICARPUS Nutt. – Groundplum Milkvetch, Buffalobean
• ASTRAGALUS DRUMMONDII Hook. – Drummond’s Milkvetch
• ASTRAGALUS EXSCAPUS L. – Milkvetch
• ASTRAGALUS GILVIFLORUS E. Sheld. – Cushion Milkvetch, Plains Milkvetch, Yellow Tufted Milkvetch
• ATRACTYLIS PREAUXIANA Sch. Bip.
• AURINIA SAXATILIS subsp. ARDUINI (Fritsch) Dostál – Golden Alison
• BALSAMORHIZA SAGITTATA (Pursh.) Nutt. – Arrowleaf Balsamroot
• BARBAREA BALCANA Panc.
• BARBAREA BRACTEOSA Guss.
• BERGENIA CRASSIFOLIA (L.) Fritsch – Elephant-ears, Siberian-tea
• BLACKSTONIA PERFOLIATA (L.) Hudson – Yellow-wort
• BOTRYCHIUM LUNARIA (L.) Schwartz – Common Moonwort
• BOUTELOUA GRACILIS (Kunth) Lag. ex Steud. – Blue Grama, Grandma’s Eyebrows, Eyelash Grass
• BUTOMUS UMBELLATUS L. – Flowering Rush
• CAKILE MARITIMA Scop. – Sea Rocket, Two-head Sea Rocket, European Searocket
• CALLUNA VULGARIS (L.) Hull. – Heather, Ling
• CALOCHORTUS APICULATUS Baker – Three-spot Mariposa-Lily, Pointedtip Mariposa Lily
• CALYPSO BULBOSA (L.) Oakes – Venus’-slipper, Fairyslipper, Calypso Orchid
• CALYSTEGIA SEPIUM (L.) R. Br. – Hedge Bindweed, Bellbine
• CAMPANULA ALPINA Jacq. – Alpine Bellflower
• CAMPANULA BOHEMICA Hruby – Bohemian Bellflower
• CAMPANULA PUNCTATA Lam. – Spotted Bellflower
• CAMPANULA ZOYSII Wulfen – Zois‘ Bellflower, Zoysi’s Harebell, Crimped Bellflower
• CARDAMINE CARNOSA Waldst. et Kit.
• CARDAMINE GLAUCA Spreng. ex DC.
• CARDARIA DRABA (L.) Desv. – Hoary Cress
• CARDOPATIUM CORYMBOSUM (L.) Pers.
• CARDUUS NUTANS L. – Musk Thistle, Nodding Plumeless Thistle
• CAREX AUREOLENSIS Steud. – Goldenfruit Sedge
• CAREX BUXBAUMII Wahlenb. – Buxbaum’s Sedge, Club Sedge
• CAREX FILIFOLIA Nutt. – Threadleaf Sedge
• CAREX INOPS subsp. HELIOPHILA (Mack.) Crins – Sun-loving Sedge, Long-stolon Sedge, Sun Sedge
• CARLINA ACAULIS L. subsp. ACAULIS – Stemless Carline Thistle
• CARLINA GRAECA Heldr. et Sart. – Greek Carline Thistle
• CARNEGIEA GIGANTEA (Engelm.) Britton et Rose – Saguaro, Giant Cactus
• CEDRONELLA CANARIENSIS (L.) Webb et Berthel. – Canary Balm, Herb of Gilead
• CENTAUREA TCHIHATCHEFFII Fisch. et Mey.
• CEPHALANTHERA DAMASONIUM (Mill.) Druce – Large White Helleborine
• CEPHALANTHERA LONGIFOLIA (L.) Fritsch. – Narrow-leaved Helleborine, Swordleaf Helleborine
• CEPHALANTHERA RUBRA (L.) L. C. Richard – Red Helleborine
• CERASTIUM DECALVANS Schloss. et Vuk.
• CERASTIUM MOESIACUM Friv.
• CERINTHE MINOR L. – Lesser Honeywort
• CEROPEGIA FUSCA Bolle – Brown-flowered Wax Plant
• CHAMAERHODOS ERECTA (L.) Bunge – Little Rose, Little Ground Rose, American Chamaerhodos
• CHENOPODIUM CAPITATUM (L.) Asch. – Strawberry Blite, Strawberry Goosefoot, Strawberry Spinach, Indian Paint, Indian Ink
• CHENOPODIUM CHENOPODIOIDES (L.) Aellen – Low Goosefoot
• CHRYSOSPLENIUM IOWENSE Rydb. – Golden Saxifrage, Iowa Golden Saxifrage
• CICUTA MACULATA L. – Spotted Water Hemlock, Spotted Parsley, Spotted Cowbane, Suicide Root
• CIRSIUM DRUMMONDII Torr. et A. Gray – Drummond’s Thistle, Dwarf or Short-stemmed Thistle
• CIRSIUM FLODMANII (Rydb.) Arthur – Flodman’s Thistle, Prairie Thistle, Woolly Thistle, Hollow-root Thistle
• CIRSIUM HOOKERIANUM Nutt. – White Thistle, Hooker’s Thistle
• CIRSIUM HORRIDULUM Michx. – Horrid Thistle, Bristly Thistle, Bull Thistle, Yellow Thistle
• CLEMATIS CRISPA L. – Marsh Clematis, Curly Clematis, Blue-jasmine
• CLEMATIS TANGUTICA (Maxim.) Korsh. – Yellow Clematis, Golden Clematis, Yellow Bower
• CLEOME LUTEA Hook. – Yellow Spiderflower, Yellow Bee Plant
• COGSWELLIA MACROCARPA (Nutt. ex Torr. et A. Gray) M. E. Jones – Large-fruited Prairie Parsley, Bigseed Biscuitroot, Giant-seed Lomatium
• COLCHICUM AUTUMNALE L. – Meadow Saffron
• COMANDRA UMBELLATA (L.) Nutt. – Bastard Toadflax, Pale Comandra, Common Comandra
• CORALLORHIZA MACULATA (Raf.) Raf. – Spotted Coralroot, Western Coralroot, Summer Coralroot
• CORALLORHIZA MERTENSIANA Bong. – Pacific Coralroot, Mertens‘ Coralroot, Western Coralroot
• CORALLORHIZA STRIATA Lindl. – Striped Coralroot
• CORALLORHIZA TRIFIDA Châtel. – Pale / Northern / Yellow Coralroot
• CORIS MONSPELIENSIS L.
• CORNUS CANADENSIS L. – Bunchberry, Canadian Bunchberry, Canadian Dwarf Cornel, Crackerberry, Creeping Dogwood
• CORNUS DRUMMONDII C. A. Mey. – Roughleaf Dogwood, Drummond’s Dogwood
• CORNUS MAS L. – Cornelian Cherry
• CORNUS SERICEA L. – Red-osier Dogwood, Red-stem Dogwood, Red-rood, American Dogwood, Western Dogwood, Red Willow
• CORYDALIS AUREA Willd. – Golden Corydalis, Scrambled Eggs
• CORYDALIS CAVA (L.) Schweigg. et Körte – Hollowroot
• CORYDALIS FLABELLATA Edgew.
• CORYDALIS SEMPERVIRENS Pers. – Pink Corydalis, Pink and Yellow Corydalis, Rock Harlequin
• CRAMBE TATARIA Sebeók – Tartarian Breadplant
• CUPRESSUS SEMPERVIRENS L. – Italian Cypress, Mediterranean Cypress
• CUSCUTA EUROPAEA L. – European Dodder, Greater Dodder
• CYCLAMEN PURPURASCENS Mill. – Purple Sowbread
• CYCLAMEN REPANDUM Sibth. et Sm. – Spring Sowbread
• CYLINDROPUNTIA BIGELOVII (Engelm.) F. M. Knuth – Teddy-bear Cholla
• CYNOMORIUM COCCINEUM L. – Scarlet Synomorium, Maltese Mushroom
• CYPERUS ERAGROSTIS Lam. – Drain Flat Sedge, Pale Galingale, Umbrella Sedge
• CYPRIPEDIUM CALCEOLUS L. – Lady’s Slipper Orchid
• CYPRIPEDIUM PARVIFLORUM Salisb. – Yellow Lady’s slipper, Mocassin Flower, Hairy Yellow Ladyslipper
• CYPRIPEDIUM PASSERINUM Richardson – Sparrow’s-egg Lady’s-slipper, Northern Lady’s-slipper, Franklin’s Lady’s-slipper
• DACTYLORHIZA CAUCASICA (Klinge) Soó – Caucasian Marsh Orchid
• DACTYLORHIZA FOLIOSA (Rchb. f.) Soó – Madeiran Orchid
• DACTYLORHIZA FUCHSII (Druce) Soó – Common Spotted Orchid
• DACTYLORHIZA INCARNATA (L.) Soó – Early Marsh Orchid
• DACTYLORHIZA LAPPONICA (Laest. ex Hartm.) Soó – Lapland Marsh Orchid
• DACTYLORHIZA MAJALIS (Rchb.) P. F. Hunt et Summerh. – Broad-Leafed Marsh Orchid
• DACTYLORHIZA OCHROLEUCA (Boll) Averyanov – Fen Early Marsh Orchid
• DACTYLORHIZA SAMBUCINA (L.) Soó – Elder-flowered Orchid
• DACTYLORHIZA URVILLEANA (Steud.) H. Baumann et Künkele – Turkish Marsh Orchid
• DALEA CANDIDA Willd. – White Prairie-clover
• DAPHNE ARBUSCULA Čelak. – Muran Daphne
• DAPHNE MEZEREUM L. – Mezereon, February Daphne
• DAPHNE STRIATA Tratt. – Striated Mezereon, Striated Daphne
• DASYLIRION WHEELERI S. Watson ex Rothr. – Sotol, Common Sotol, Desert Spoon, Spoon Leaf
• DAVALLIA CANARIENSIS (L.) Sm. – Deer-foot Fern, Are-foot Fern
• DELPHINIUM ELATUM L. – Candle Larkspur, Alpine Delphinium
• DIANTHUS ARENARIUS subsp. BOHEMICUS (Novák) O. Schwarz – Bohemian Sand Pink
• DIANTHUS DELTOIDES L. – Maiden Pink
• DIANTHUS MORAVICUS Kovanda – Moravian Pink
• DIANTHUS REPENS Willd. – Northern Pink
• DICTAMNUS ALBUS L. – Burning Bush
• DIETERIA CANESCENS (Pursh) Nutt. – Hoary Aster, Hoary Tansyaster
• DIGITALIS GRANDIFLORA Miller – Large Yellow Foxglove
• DIPHASIASTRUM COMPLANATUM (L.) Holub – Groundcedar, Creeping Jenny, Northern Running-pine
• DODECATHEON CONJUGENS Greene – Shooting Star, Mountain Shootingstar, Bonneville Shootingstar
• DRACOCEPHALUM THYMIFLORUM L. – Thymeleaf Dragonhead, Eurasian Dragonhead
• DROSERA ROTUNDIFOLIA L. – Common Sundew
• DRYAS OCTOPETALA L. – Mountain Avens
• DRYOPTERIS LUDOVICIANA (Kunze) Small – Southern Woodfern
• ECHINOCEREUS ARIZONICUS Rose ex Orcutt – Arizona Claret-cup Cactus, Arizona Hedgehog Cactus
• ECHINOCEREUS COCCINEUS Engelm. – Claret-cup Cactus, Scarlet Hedgehog Cactus
• ECHINOCEREUS RIGIDISSIMUS (Engelm.) F. Haage – Arizona Rainbow Cactus, Rainbow Hedgehog Cactus
• ECHINOPS SPHAEROCEPHALUS L. – Great Globe-thistle
• ECHIUM CANDICANS L. f. – Pride of Madeira
• ECHIUM ITALICUM L. – Italian Bugloss, Pale Bugloss
• ECHIUM MACULATUM L. – Russian Bugloss
• ECHIUM VULGARE L. – Viper’s Bugloss
• ECHIUM WILDPRETII H. Pearson ex Hook. f. – Tower of Jewels
• EPILOBIUM ANAGALLIDIFOLIUM Lam. – Alpine Willowherb, Pimpernel Willowherb
• EPILOBIUM ANGUSTIFOLIUM L. – Rosebay Willowherb
• EPIPACTIS GREUTERI H. Baumann et Künkele – Greuter’s Helleborine
• EPIPACTIS MICROPHYLLA (Ehrh.) Sw. – Small-leaved Helleborine
• EPIPACTIS PALUSTRIS (L.) Crantz – Marsh Helleborine
• EPIPACTIS PLACENTINA Bongiorni et P. Grünanger
• EPIPACTIS VOETHII Robatsch
• ERANTHIS HYEMALIS (L.) Salisb. – Winter Aconite
• ERICA ARBOREA L. – Brierroot, Tree Heath
• ERICA MADERENSIS (DC.) Bornm. – Madeira Grey Heather, Madeira Bell-Heather
• ERIGERON CAESPITOSUS Nutt. – Tufted Fleabane
• ERIGERON COMPOSITUS Pursh – Cut-leaved Fleabane, Dwarf Mountain Fleabane
• ERIGERON GLABELLUS Nutt. – Smooth Fleabane, Streamside Fleabane
• ERIGERON HUMILIS Graham – Arctic Fleabane, Alpine Fleabane
• ERIGERON SPECIOSUS (Lindl.) DC. – Showy Fleabane, Aspen Fleabane, Aspen daisy, Garden Fleabane
• ERIOGONUM ANDROSACEUM Benth. – Wild Buckwheat, Rock-jasmine Buckwheat, Silverplant
• ERIOGONUM FLAVUM Nutt. ex Benth. – Yellow Umbrellaplant, Golden Buckwheat, Alpine Golden Buckwheat
• ERIOGONUM OVALIFOLIUM Nutt. – Cushion Buckwheat, Silverplant, Wild Buckwheat, Steamboat Buckwheat
• ERIOGONUM UMBELLATUM Torr. – Umbrellaplant, Sulphurflower Buckwheat, Sulphur Flower
• ERITRICHIUM NANUM (Vill.) Schrad. ex Gaudin – Arctic Alpine Forget-me-not
• EROPHILA VERNA (L.) Bess. – Common Whitlow-grass
• ERYTHRINA FLABELLIFORMIS Kearney – Coral Bean, Southwest Coral Bean, Chilicote
• ERYTHRONIUM MONTANUM S. Watson – Avalanche Lily, White Avalanche Lily
• EUPHORBIA ATROPURPUREA Brouss. ex Willd.
• EUPHORBIA BALSAMIFERA Ait.
• EUPHORBIA LATHYRIS L. – Moleplant, Caper Spurge
• EUPHORBIA RADIANS Benth. – Sun Spurge
• EURYBIA CONSPICUA (Lindl.) G. L. Nesom – Showy Aster, Western Showy Aster
• EURYBIA SIBIRICA (L.) G. L. Nesom – Siberian Aster, Arctic Aster
• EUTHAMIA GRAMINIFOLIA (L.) Nutt. – Flat-top Goldenrod, Flat-top Goldentop
• FAGUS SYLVATICA L. – European Beech
• FILIPENDULA ULMARIA (L.) Maxim. – Meadowsweet
• FILIPENDULA VULGARIS Moench – Dropwort
• FRASERA SPECIOSA Douglas ex Hook. – Green Gentian, Monument Plant, Elkweed, Deer’s Ears, Showy Elkweed
• FRAXINUS EXCELSIOR L. – European Ash
• FUMANA PROCUMBENS (Dunal) Gren. et Godr. – Sprawling Needle Sunrose
• FUMANA THYMIFOLIA (L.) Spach – Thyme-leaved Fumana
• GAGEA BOHEMICA (Zauschn.) Schult. et Schult. f. – Early Star-of-Bethlehem
• GAGEA GRAECA (L.) Irmsch.
• GAGEA LUTEA (L.) Ker-Gawler – Yellow Star-of-Bethlehem
• GAILLARDIA ARISTATA Pursh – Gaillardia, Blanketflower, Common Blanketflower
• GALANTHUS NIVALIS L. – Common Snowdrop
• GALATELLA LINOSYRIS (L.) Rchb. f. – Goldilocks Aster, Goldilocks
• GALIUM TRIFIDUM L. – Small Bedstraw, Threepetal Bedstraw
• GALIUM TRIFLORUM Michx. – Sweet-scented Bedstraw, Cudweed, Fragrant Bedstraw
• GAULTHERIA PROCUMBENS L. – Eastern Teaberry, Checkerberry, Boxberry, American Wintergreen
• GAURA COCCINEA Nutt. ex Pursh – Butterfly Weed, Scarlet Gaura, Scarlet Beeblossom
• GENTIANA ACAULIS L. – Stemless Gentian
• GENTIANA AFFINIS Griseb. – Prairie Gentian, Pleated Gentian, Trapper’s Gentian, Bottle Gentian
• GENTIANA ASCLEPIADEA L. – Willow Gentian
• GENTIANA CLUSII Perr. et Songeon – Clusius‘ Gentian
• GENTIANA CRUCIATA L. – Cross Gentian
• GENTIANA NIVALIS L. – Alpine Gentian, Snow Gentian
• GENTIANA PANNONICA Scop. – Hungarian Gentian, Pannonic Gentian
• GENTIANA PUNCTATA L. – Spotted Gentian
• GENTIANELLA AMARELLA (L.) Börner – Autumn Dwarf Gentian
• GENTIANOPSIS CILIATA (L.) Ma – Fringed Gentian
• GENTIANOPSIS MACOUNII (Holm) Iltis – Macoun’s Fringed Gentian, Macoun’s Gentian
• GENTIANOPSIS THERMALIS (Kuntze) Iltis – Rocky Mountain Fringed Gentian
• GEOCAULON LIVIDUM (Richardson) Fernald – False Toadflax, Northern Comandra
• GERANIUM BICKNELLII Britton – Bicknell’s Cranesbill
• GERANIUM ERIANTHUM DC. – Northern Geranium, Woolly Geranium, Northern Crane’s-bill
• GERANIUM RICHARDSONII Fisch. et Trautv. – Richardson’s Geranium, Wild White Geranium, Richardson’s Cranebill
• GERANIUM VISCOSISSIMUM Fisch. et C. A. Mey. – Sticky Purple Geranium, Sticky Geranium, Sticky Purple Crane’s-bill
• GEUM TRIFLORUM Pursh – Three-flowered Avens, Prairie Smoke, Old Man’s Whiskers
• GLADIOLUS TRIPHYLLUS (Sm.) Ker Gawl. – Three-leaved Gladiolus
• GLANDULARIA BIPINNATIFIDA (Schauer) Nutt. – Southwestern Mock Vervain, Dakota Verbena
• GLAUX MARITIMA L. – Sea-milkwort
• GLECHOMA HEDERACEA L. – Ground Ivy, Gill-over-the-ground
• GLYCYRRHIZA LEPIDOTA Pursh – Wild Licorice, American Licorice, Nuttall’s Licorice
• GOMPHRENA HAAGEANA Klotzsch – Rio Grande Globe Amaranth
• GOODYERA OBLONGIFOLIA Raf. – Giant Rattlesnake-plantain, Menzies’s Giant Rattlesnake-plantain
• GOODYERA REPENS (L.) R. Br. – Lesser Rattlesnake Plantain, Dwarf Rattlesnake-plantain, Creeping Lady’s-tresses
• GRINDELIA SQUARROSA (Pursh) Dunal – Gumweed, Curlycup Gumweed, Curly-top Gumweed, Rosinweed, Tarweed
• GUTIERREZIA SAROTHRAE (Pursh) Britton et Rusby – Broom Snakeweed, Broomweed, Snakeweed, Matchweed
• GYMNADENIA CONOPSEA (L.) R. Brown. subsp. CONOPSEA – Fragrant Orchid
• HABENARIA TRIDACTYLITES Lindl.
• HALENIA CORNICULATA (L.) Cornaz
• HALENIA DEFLEXA (Sm.) Griseb. – Spurred Gentian, American Spurred Gentian
• HEDERA HELIX L. – Ivy
• HEDYSARUM ALPINUM L. – Alpine Sweet-vetch, Alpine Hedysarum
• HEDYSARUM BOREALE Nutt. – Northern Sweet-vetch, Northern Hedysarum, Boreal Sweet-vetch, Utah Sweetvetch, Plains Sweet-broom
• HEDYSARUM SULPHURESCENS Rydb. – Yellow / White Sweet-vetch, Yellow Hedysarum
• HELIANTHEMUM APENNINUM (L.) Mill. – White Rockrose
• HELIANTHEMUM CANUM (L.) Baumg. – Hoary Rockrose
• HELIANTHUS ANNUUS L. – Common Annual Sunflower, Sunflower, Wild Sunflower
• HELIANTHUS MAXIMILIANI Schrad. – Maximilan Sunflower
• HELIANTHUS NUTTALLII Torr. et A. Gray – Nuttall’s Sunflower, Common Tall Sunflower
• HELIANTHUS PAUCIFLORUS subsp. SUBRHOMBOIDEUS (Rydb.) O. Spring et E. E. Schill. – Stiff Sunflower, Rhombic-leaved Sunflower
• HELLEBORUS NIGER L. – Black Hellebore, Christmas-rose
• HERACLEUM MANTEGAZZIANUM Sommier et Levier – Giant Hogweed, Cartwheel-flower
• HESPERIS TRISTIS L.
• HESPEROCALLIS UNDULATA A. Gray – Desert Lily, Ajo Lily
• HETEROTHECA VILLOSA (Pursh) Shinners – Golden Aster, Hairy Goldenaster
• HIERACIUM AURANTIACUM L. – Orange Hawkweed
• HIERACIUM SCOULERI Hooker – Scouler’s Woollyweed, Hounds-tongue Hawkweed
• HIMANTOGLOSSUM ADRIATICUM H. Baumann – Adriatic Lizard Orchid
• HIMANTOGLOSSUM HIRCINUM (L.) Spreng. – Lizard Orchid
• HIPPURIS VULGARIS L. – Common Mare’s-tail
• HYMENOCALLIS LIRIOSME (Raf.) Shinners – Western Marsh Spider-lily, Louisiana Marsh Spider-lily, Spring Spiderlily
• HYOSCYAMUS NIGER L. – Henbane
• HYPERICUM PERFORATUM L. – Perforate St. John’s Wort
• HYSSOPUS OFFICINALIS L. – Hyssop
• ILEX VOMITORIA Aiton – Yaupon, Yaupon Holly, Indian Tea, Winterberry, Christmasberry, Cassena, Evergreen Holly
• ILIAMNA RIVULARIS (Douglas ex Hook.) Greene – Streambank Wild Hollyhock, Wild Hollyhock, Mountain Globemallow
• INULA OBTUSIFOLIA A. Kerner
• IPOMOEA ALBA L. – Moonflower, Moon Vine, Tropical White Morning-glory
• IPOMOEA IMPERATI (Vahl) Griseb. – Beach Morning Glory
• IPOMOEA PES-CAPRAE (L.) R. Br. – Railroad Vine, Bayhops
• IPOMOEA QUAMOCLIT L. – Cypress Vine, Cardinal Creeper, Cardinal Vine, Star Glory, Hummingbird Vine, Cypressvine Morning Glory
• IRIS ARENARIA Waldst. et Kit. – Sandy Iris
• IRIS FULVA Ker Gawl. – Copper Iris
• IRIS LACTEA Pall. – White-flower Chinese Iris
• IRIS MISSOURIENSIS Nutt. – Western Blue Flag, Rocky Mountain Iris
• IRIS PSEUDACORUS L. – Yellow Flag
• IRIS PSEUDOPUMILA Tineo
• IRIS PUMILA L. – Dwarf Iris, Pygmy Iris
• IRIS ROSENBACHIANA Regel
• IRIS VARIEGATA L. – Hungarian Iris
• IRIS VIRGINICA L. – Southern Blue Flag, Virginia Iris
• ISOPLEXIS SCEPTRUM (L. fil.) Loud.
• JASMINUM MESNYI Hance – Chinese Jasmine, Japanese Jasmine, Primrose Jasmine
• JOVIBARBA GLOBIFERA (L.) J. Parnell – Hen and Chickens Houseleek
• JUNIPERUS COMMUNIS L. – Common Juniper, Malchangel
• KLEINIA NERIIFOLIA Haw. – Canary Islands Candle Plant
• LARREA TRIDENTATA (Sessé et Moc. ex DC.) Coville – Creosote Bush, Chaparral
• LATHRAEA SQUAMARIA L. – Common Toothwort
• LATHYRUS OCHROLEUCUS Hook. – Yellow Peavine, Cream-coloured Vetchling, Pale Vetchling, Cream Pea
• LAVANDULA STOECHAS L. – French Lavender, Italian Lavender, Spanish Lavender, Topped Lavender, Wild Lavender, Bush Lavender
• LEONTOPODIUM ALPINUM Cass. – Edelweiss
• LEUCOJUM AESTIVUM L. – Loddon-lily, Summer Snowflake
• LEUCOJUM VERNUM L. – Spring Snowflake
• LEWISIA PYGMAEA (A. Gray) B. L. Rob. – Alpine Lewisia, Pygmy Bitterroot
• LEWISIA REDIVIVA Pursh – Bitterroot
• LILIUM MARTAGON L. – Martagon, Turk’s Cap Lily
• LILIUM PHILADELPHICUM L. – Western Wood Lily, Prairie Lily, Red Lily
• LIMODORUM ABORTIVUM (L.) Sw. – Violet Limodore, Violet Bird’s-nest Orchid
• LINARIA ALPINA (L.) Mill. – Alpine Toadflax
• LINUM LEWISII Pursh – Wild Blue Flax, Blue Flax, Prairie Flax
• LINUM RIGIDUM Pursh – Yellow Flax, Stiffstem Flax
• LINUM USITATISSIMUM L. – Common Flax
• LIPARIS LOESELII (L.) Rich. – Yellow Widelip Orchid, Fen Orchid
• LIQUIDAMBAR STYRACIFLUA L. – Sweetgum, American Sweetgum, Hazel Pine, Bilsted, Red-gum, Satin Walnut, Star-leaved Gum, Alligator Wood
• LISTERA BOREALIS Morong – Northern Twayblade
• LISTERA CORDATA (L.) R. Br. – Heartleaf Twayblade, Lesser Twayblade
• LITHODORA HISPIDULA (Sibth. et Sm.) Griseb. – Gromwell
• LITHOSPERMUM INCISUM Lehm. – Narrow-leaved Pucoon, Plains Stoneseed, Fringed Gromwell
• LITHOSPERMUM PURPUROCAERULEUM L. – Purple Gromwell, Blue Gromwell
• LITHOSPERMUM RUDERALE Douglas ex Lehm. – Woolly Gromwell, Western Stonessed, Yellow Pucoon
• LOBULARIA MARITIMA (L.) Desv. – Sweet Alison, Sweet-Alice, Sweet-alyssum
• LUNARIA REDIVIVA L. – Perennial Honesty
• LUNARIA TELEKIANA Jáv.
• LUPINUS SERICEUS Pursh – Perennial Lupine, Flexile Lupine, Silky Lupine
• LYCHNIS CHALCEDONICA L. – Maltese Cross, Scarlet-lychnis
• LYCOPODIUM ANNOTINUM L. – Stiff Clubmoss
• LYGODESMIA JUNCEA (Pursh) D. Don ex Hook. – Rush Skeletonplant
• LYSICHITON AMERICANUS Hulten et H. St. John – Western Skunk Cabbage, Yellow Skunk Cabbage
• LYSIMACHIA CILIATA L. – Fringed Loosestrife
• MAGNOLIA GRANDIFLORA L. – Southern Magnolia, Bull-bay
• MAGNOLIA VIRGINIANA L. – Swamp-bay, Sweet-bay, Sweet-bay Magnolia
• MAIANTHEMUM CANADENSE Desf. – Wild Lily-of-the-valley, Canada Mayflower, Two-leaved Solomonseal
• MAIANTHEMUM RACEMOSUM subsp. AMPLEXICAULE (Nutt.) LaFrankie – False Solomon’s Seal, Feathery False Lily of the Valley, Solomon’s Plume, False Spikenard, Treacleberry
• MAIANTHEMUM STELLATUM (L.) Link – Little False Solomon’s-seal, Starflower Solomon’s-seal
• MARESIA NANA (DC.) Batt.
• MARMORITIS ROTUNDIFOLIA Benth.
• MATTHIOLA MADERENSIS Lowe – Madeira Sea Stock
• MATTHIOLA TRICUSPIDATA (L.) R. Br. – Three-horned Stock
• MECONOPSIS BETONICIFOLIA Franch. – Himalayan Blue Poppy
• MECONOPSIS CAMBRICA Vig. – Welsh Poppy
• MEDEOLA VIRGINIANA L. – Indian Cucumber-root, Indian Cucumber
• MEDICAGO ARABICA (L.) Huds. – Spotted Medick
• MELAMPYRUM ARVENSE L. – Field Cow-wheat
• MENYANTHES TRIFOLIATA L. – Bogbean
• MERTENSIA MARITIMA (L.) Gray – Northern Shorewort, Oysterplant, Oysterleaf, Sea-lungwort
• MERTENSIA PANICULATA (Aiton) G. Don – Tall Lungwort, Tall Bluebells, Languid Ladies, Dangling Damsels
• MICROULA TIBETICA Benth.
• MIMOSA NUTTALLII (DC.) B. L. Turner – Catclaw Brier, Sensitive Brier, Nuttall’s Sensitive Brier, Shame-boy, Devil’s Shoestrings
• MINUARTIA SEDOIDES (L.) Hiern. – Mossy Cyphel
• MIRABILIS HIRSUTA (Pursh) MacMill. – Hairy Four O’clock, Hairy Umbrellawort
• MIRABILIS LINEARIS (Pursh) Heimerl – Narrowleaf Four O’Clock, Ribbon Four O’Clock
• MITELLA NUDA L. – Bishop’s-cap, Naked Mitrewort, Common Mitrewort, Bare-stemmed Mitrewort
• MONARDA PUNCTATA L. – Spotted Beebalm, Dotted Horsemint, Dotted Monarda
• MONOTROPA UNIFLORA L. – Indian-pipe, Ghost Plant, Corpse Plant
• MORAEA SISYRINCHIUM (L.) Ker Gawl. – Barbary-nut
• MORELLA CERIFERA (L.) Small – Bayberry, Candleberry, Wax Myrtle
• MUSINEON DIVARICATUM (Pursh) Nutt. – Leafy Wildparsley, Musineon
• MYRICARIA GERMANICA (L.) Desv. – False Tamarisk, German Tamarisk
• NEATOSTEMA APULUM (L.) I. M. Johnst. – Hairy Sheepweed
• NONEA PULLA (L.) DC. – Wrinklenut
• NOTHOLAENA MARANTAE (L.) Desv.
• NUPHAR LUTEA (L.) Smith – Yellow Waterlily
• NYMPHAEA AMPLA (Salisb.) DC. – Dotleaf Waterlily
• OENOTHERA PALLIDA Lindl. – Pale Evening Primrose
• OLNEYA TESOTA A. Gray – Desert Ironwood, Ironwood Tree
• ONOBRYCHIS VENOSA (Desf.) Desv. – Veined Sainfoin
• ONONIS SPINOSA L. – Spiny Restharrow
• ONOSMA FRUTICOSA Sibth. et Sm. – Shrubby Golden-drop
• ONOSMODIUM BEJARIENSE var. OCCIDENTALE (Mack.) B. L. Turner – Western Marbleseed, False Gromwell
• OPHIOGLOSSUM VULGATUM L. – English Adder’s-tongue, Southern Adder’s-tongue
• OPHRYS APIFERA Huds. – Bee Orchid
• OPHRYS BISCUTELLA O. et D. Danesch
• OPHRYS BOMBYLIFLORA Link – Bumblebee Orchid
• OPHRYS HOLOSERICEA subsp. HOLUBYANA (Andrasovszky) Dostál – Late Spider Orchid
• OPHRYS SPHEGODES Mill. – Early Spider Orchid
• OPHRYS TENTHREDINIFERA Willd. – Sawfly Orchid
• OPLOPANAX HORRIDUS (Sm.) Miq. – Devil’s Club, Devil’s Walking Stick
• ORCHIS ANATOLICA subsp. TROODI Renz – Troodos Anatolian Orchid
• ORCHIS CANARIENSIS Lindl.
• ORCHIS ITALICA Poir. – Italian Orchid, Naked Man Orchid
• ORCHIS MILITARIS L. – Military Orchid
• ORCHIS MORIO L. – Green-winged Orchid
• ORCHIS PALLENS L. – Pale-flowered Orchid
• ORCHIS PAPILIONACEA L. – Butterfly Orchid
• ORCHIS PAUCIFLORA Ten. – Sparse-flowered Orchid
• ORCHIS PROVINCIALIS Balb. ex Lam. et DC. – Provence Orchid
• ORCHIS PURPUREA Huds. – Lady Orchid
• ORCHIS QUADRIPUNCTATA Cirillo ex Ten. – Four-spotted Orchid
• ORCHIS SCOPULORUM Summerh. – Branching Orchid, Rock Orchid
• ORCHIS TRIDENTATA Scop. – Toothed Orchid
• ORNITHOGALUM ARABICUM L. – Arabian Starflower
• ORNITHOGALUM COMOSUM L.
• ORNITHOGALUM KOCHII Parl.
• OROBANCHE FASCICULATA Nutt. – Clustered Broomrape, Bundled Broomrape
• OROBANCHE UNIFLORA L. – One-flowered Broomrape
• ORTHOCARPUS LUTEUS Nutt. – Yellow Owl’s-clover, Owl-clover
• OXALIS VIOLACEA L. – Violet Wood-sorrel, Sour Grass, Sour Trefoil, Shamrock
• OXYTROPIS PILOSA (L.) DC. – Hairy Milk Vetch
• OXYTROPIS PODOCARPA A. Gray – Inflated Oxytrope, Stalkpod Locoweed, Inflated Locoweed
• OXYTROPIS SERICEA Nutt. – Early Yellow Locoweed, Silky Locoweed, White Locoweed, White Point-vetch, Whitepoint Crazyweed, White Locoweed
• OXYTROPIS SPLENDENS Douglas – Showy Locoweed, Showy Crazyweed
• OXYTROPIS VISCIDA Torr. et A. Gray – Sticky Locoweed, Viscid Locoweed
• PACKERA CANA (Hook.) W. A. Weber et Á. Löve – Woolly Groundsel
• PAEDEROTA BONAROTA (L.) L.
• PANCRATIUM MARITIMUM L. – Sea-daffodil
• PAPAVER ARGEMONE L. – Prickly Poppy
• PAPAVER RHOEAS L. – Common Poppy
• PARNASSIA FIMBRIATA K. D. Koenig – Fringed Grass-of-Parnassus
• PARNASSIA PALUSTRIS L. – Grass-of-Parnassus, Bog Star, Marsh Parnassia
• PARONYCHIA MACROSEPALA Boiss.
• PARONYCHIA SESSILIFLORA Nutt. – Creeping Nailwort, Low Whitlow-wort
• PARTHENIUM HYSTEROPHORUS L. – Bitterweed, Carrot-grass, Santa Maria Feverfew
• PEDICULARIS EXALTATA Bunge – Lousewort
• PEDICULARIS FOLIOSA L. – Leafy Lousewort
• PEDICULARIS GRAECA Bunge
• PEDICULARIS PETIOLARIS Ten.
• PEDICULARIS PORTENSCHLAGII Saut. ex Rchb. – Lousewort
• PEDICULARIS SCEPTRUM-CAROLINUM L. – Moor-king Lousewort
• PEDICULARIS VERTICILLATA L. – Whorled Lousewort
• PEGAEOPHYTON SCAPIFLORUM (Hook. f. et Thomson) C. Marquand et Airy Shaw
• PENSTEMON NITIDUS Douglas ex Benth. – Smooth Blue Beardtongue, Waxleaf Penstemon
• PERICALLIS APPENDICULATA (L. f.) B. Nord.
• PERICALLIS AURITA (L’Hér.) B. Nord. – Madeira Groundsel
• PETASITES FRIGIDUS (L.) Fr. – Arctic Sweet Coltsfoot, Northern Coltsfoot, Arctic Butterbur
• PETROCALLIS PYRENAICA (L.) R. Br. – Pyrenean Whitlow Grass
• PETRORHAGIA SAXIFRAGA (L.) Link – Tunic Flower, Coat Flower, Saxifrage-pink
• PHACELIA SERICEA (Graham) A. Gray – Silky Scorpionweed, Silky Phacelia, Blue Alpine Phacelia, Sky-pilot
• PHLOX HOODII Richardson – Moss Phlox, Spiny Phlox, Hood’s Phlox, Carpet Phlox
• PHYLLODOCE GLANDULIFLORA (Hook.) Coville – Yellow Mountain Heather, Yellow Heather
• PHYSALIS ALKEKENGI L. – Cape Gooseberry, Chinese Lantern, Winter Cherry
• PHYSARIA ARENOSA (Richardson) O’Kane et Al-Shehbaz – Sand Bladderpod, Great Plains Bladderpod
• PHYSARIA DIDYMOCARPA (Hook.) A. Gray – Double Bladderpod, Common Twinpod
• PHYSOCHLAINA ORIENTALIS G. Don
• PHYSOCHLAINA PRAEALTA (Decne.) Miers
• PHYSOPLEXIS COMOSA (L.) Schur – Devil’s Claw, Tufted Horned Rampion
• PHYTOLACCA AMERICANA L. – American Pokeweed, Common Pokeweed, Inkberry, Pigeonberry, Pokeroot
• PICEA OMORIKA (Pančić) Purkyně – Serbian Spruce
• PINGUICULA VULGARIS L. – Common Butterwort
• PINUS CANARIENSIS Chr. Sm. ex DC. – Canary Island Pine
• PINUS CEMBRA L. – Arolla Pine, Swiss Pine
• PINUS FLEXILIS E. James – Limber Pine
• PINUS KESIYA Royle ex Gordon – Khasi Pine
• PINUS MUGO Turra – Mountain Pine
• PINUS PARVIFLORA Siebold et Zucc. – Japanese White Pine
• PINUS PINEA L. – Stone Pine, Umbrella Pine, Italian Stone Pine
• PINUS SYLVESTRIS L. – Scots Pine, Scotch Pine
• PLANTAGO AFRA L. – African Plantain, Glandular Plantain, Black Psyllium
• PLANTAGO ALBICANS L. – Downy Plantain
• PLANTAGO ARENARIA Waldst. et Kit. – Sand Plantain, Branched Plantain, French Psyllium
• PLANTAGO CRETICA L. – Cretan Plantain
• PLEOPELTIS POLYPODIOIDES (L.) E. G. Andrews et Windham – Resurrection Fern
• PLOCAMA PENDULA Ait.
• POLEMONIUM PULCHERRIMUM Hook. – Showy Jacob’s-ladder, Beautiful Jacob’s-ladder, Skunk-leaved Polemonium
• POLYGALA CHAMAEBUXUS L. – Box-leaved Milkwort
• POLYGALA SENEGA L. – Seneca Root, Seneca Snakeroot, Rattlesnake Root, Mountain Flax
• POLYGONATUM MULTIFLORUM (L.) All. – Common Solomon’s Seal
• POLYPODIUM VULGARE L. – Common Polypody
• PONTEDERIA CORDATA L. – Pickerelweed
• POTENTILLA ALBA L. – White Cinquefoil
• POTENTILLA ARGUTA Pursh – Tall Cinquefoil, White Cinquefoil, Sticky Cinquefoil, Prairie Cinquefoil
• POTENTILLA CONCINNA Richardson – Elegant Cinquefoil, Early Cinquefoil
• POTENTILLA GRACILIS Douglas ex Hook. – Graceful Cinquefoil, Slender Cinquefoil
• POTENTILLA HIPPIANA Lehm. – Horse Cinquefoil, Woolly Cinquefoil, Hipp’s Cinquefoil
• POTENTILLA NITIDA L. – Dolomite Cinquefoil
• POTENTILLA NIVEA L. – Snow Cinquefoil
• PRIMULA AURICULA L. – Bear’s-ear
• PRIMULA CUNEIFOLIA Ledeb. – Wedgeleaf Primrose
• PRIMULA ELATIOR (L.) Hill – Oxlip
• PRIMULA INCANA M. E. Jones – Mealy Primrose, Silvery Primrose
• PRIMULA MACROPHYLLA D. Don – Primrose
• PRIMULA MINIMA L. – Fairy Primrose
• PRIMULA VERIS L. – Cowslip
• PROSARTES TRACHYCARPA S. Watson – Fairybells, Rough-fruited Fairy-bells, Rough-fruited Mandarin
• PROSOPIS VELUTINA Wooton – Velvet Mesquite, Native Mesquite, Arizona Mesquite
• PRUNUS PENSYLVANICA L. f. – Pin Cherry, Bird Cherry, Fire Cherry, Red Cherry
• PRUNUS VIRGINIANA L. – Chokecherry, Virginia Bird Cherry, Black Chokecherry
• PSEUDOFUMARIA ALBA (Mill.) Lidén – Pale Corydalis
• PSEUDOFUMARIA LUTEA (L.) Borkh. – Yellow Corydalis, Rock Fumewort
• PSEUDOLARIX AMABILIS (J. Nelson) Rehder
• PSEUDOLYSIMACHION SPICATUM (L.) Opiz – Spiked Speedwell
• PSEUDOTSUGA MENZIESII (Mirbel) Franco – Douglas-fir
• PTEROCEPHALUS PERENNIS subsp. BELLIDIFOLIUS (Boiss.) Vierh.
• PTEROSPORA ANDROMEDEA Nutt. – Pinedrops, Albany Beechdrops, Giant Bird’s nest
• PULSATILLA GRANDIS Wenderoth – Pasque Flower, Meadow Anemone
• PULSATILLA OCCIDENTALIS (S. Watson) Freyn – Western Pasqueflower, Chalice-flower, Mountain Pasqueflower, White Pasqueflower
• PULSATILLA PATENS subsp. MULTIFIDA (Pritz.) Zämelis – Prairie Crocus, Pasque-flower
• PULSATILLA PRATENSIS (L.) Mill. – Small Pasque Flower
• PYRRHOPAPPUS CAROLINIANUS (Walter) DC. – Carolina Desert-chicory, Carolina False Dandelion
• PYRROCOMA LANCEOLATA (Hook.) Greene – Lance-leaved Ironplant, Lance-leaved Goldenweed
• QUERCUS ALNIFOLIA Poech – Golden Oak
• QUERCUS VIRGINIANA Mill. – Live Oak, Bay live Oak, Scrub Live Oak, Plateau Oak, Escarpment Live Oak
• RAMONDA SERBICA Pančić
• RANUNCULUS ALPESTRIS L. – Alpine Buttercup
• RANUNCULUS BREVIFOLIUS Ten.
• RANUNCULUS GLABERRIMUS var. ELLIPTICUS (Greene) Greene – Early Buttercup, Sagebrush Buttercup
• RESEDA PHYTEUMA L. – Rampion Mignonette
• RHODIOLA INTEGRIFOLIA Raf. subsp. INTEGRIFOLIA – Roseroot, Ledge Stonecrop
• RHODIOLA ROSEA L. – King’s-crown, Roseroot, Rosewort
• RHODODENDRON FERRUGINEUM L. – Alpine-rose
• RHODODENDRON KAMTSCHATICUM Pall. – Kamchatka Rhododendron
• RHODOTHAMNUS CHAMAECISTUS (L.) Rchb. – Dwarf Alpenrose, Ground Cistus
• ROSA ARKANSANA Porter – Prairie Rose, Wild Prairie Rose
• RUBIA PEREGRINA L. – Wild Madder
• RUBUS TRIVIALIS Michx. – Southern Dewberry
• RUMEX VERTICILLATUS L. – Swamp Dock, Water Dock
• SABAL MINOR (Jacq.) Pers. – Dwarf Palmetto, Blue Palm, Blue Palmetto, Dwarf Palm, Little Blue Stem
• SAGITTARIA LATIFOLIA Willd. – Wapato, Common Arrowhead, Duck-potato, Broadleaf Arrowhead, Indian Potato
• SALIX EXIGUA Nutt. – Sandbar Willow, Narrowleaf Willow, Coyote Willow
• SALIX HERBACEA L. – Dwarf Willow, Snowbed Willow
• SALIX NIVALIS Hook. – Snow Willow
• SALVIA COCCINEA Buc’hoz ex Etl. – Scarlet Sage, Texas Sage, Tropical Sage, Blood Sage, Hummingbird Sage
• SANGUINARIA CANADENSIS L. – Bloodroot, Puccoon, Redroot
• SANGUISORBA OFFICINALIS L. – Great Burnet
• SANICULA MARILANDICA L. – Snake Root, Maryland Sanicle
• SARCODES SANGUINEA Torr. – Snow Plant, Snow Flower
• SAURURUS CERNUUS L. – Lizard’s Tail, Water Dragon, Swamp Root, Swamp Lily
• SAXIFRAGA FLAGELLARIS Willd. – Whiplash Saxifrage, Spider Saxifrage
• SAXIFRAGA MARGINATA Sternb.
• SAXIFRAGA OCCIDENTALIS S. Watson – Western Saxifrage, Alberta Saxifrage, Redwool Saxifrage
• SAXIFRAGA PANICULATA Miller – Livelong Saxifrage
• SAXIFRAGA PEDEMONTANA subsp. CYMOSA Engl.
• SAXIFRAGA SEMPERVIVUM K. Koch
• SCHOENOPLECTUS SUPINUS (L.) Palla
• SCUTELLARIA INTEGRIFOLIA L. – Helmet Flower, Hissopleaf Skullcap, Helmet Skullcap, Hyssop Skullcap
• SEDUM ACRE L. – Wall Pepper
• SEDUM CAESPITOSUM (Cav.) DC.
• SEDUM CEPAEA L.
• SEDUM FARINOSUM Lowe – Mealy Stonecrop
• SEDUM MAGELLENSE Ten.
• SEDUM MICROSTACHYUM (Kotschy) Boiss. – Small-spiked Stonecrop
• SEDUM MUCIZONIA (Ortega) Raym.-Hamet
• SEDUM OCHROLEUCUM Chaix
• SEDUM TELEPHIUM subsp. MAXIMUM (L.) Kirschl. – Orpine, Livelong
• SEDUM TYMPHAEUM Quézel et Contandr.
• SEMPERVIVUM TECTORUM L. – Common Houseleek, Liveforever
• SENECIO EREMOPHILUS Richardson – Cut-leaved Ragwort, Desert Ragwort
• SENECIO PALMENSIS (Nees) C. Sm. ex Link – Ragwort
• SERAPIAS LINGUA L. – Tongue Serapias, Tongue Orchid
• SERAPIAS PARVIFLORA Parl. – Small-flowered Serapias, Small-flowered Tongue Orchid
• SESUVIUM PORTULACASTRUM (L.) L. – Seaside Purslane, Shoreline Purslane, Sea Purslane
• SHEPHERDIA ARGENTEA (Pursh) Nutt. – Thorny Buffaloberry, Silver Buffalberry, Bull Berry
• SHEPHERDIA CANADENSIS (L.) Nutt. – Canadian Buffaloberry, Russet Buffaloberry, Soapberry, Foamberry, Soopolallie
• SIBBALDIA PARVIFLORA Willd.
• SIBTHORPIA PEREGRINA L. – Madeira Moneywort
• SILENE ACAULIS (L.) Jacq. – Moss Campion
• SILENE UNIFLORA Roth – Sea Campion
• SISYRINCHIUM ROSULATUM E. P. Bicknell – Annual Blue-eyed Grass
• SISYRINCHIUM SEPTENTRIONALE E. P. Bicknell – Mountain Blue-eyed Grass, Northern Blue-eyed Grass
• SIUM SUAVE Walter – Hemlock Waterparsnip, Water Parsnip, Water Parsley
• SOLIDAGO MISSOURIENSIS Nutt. – Missouri Goldenrod, Prairie Goldenrod
• SOLIDAGO MULTIRADIATA Aiton – Rocky Mountain Goldenrod, Northern Goldenrod, Alpine Goldenrod
• SOLIDAGO SIMPLEX Kunth – Mountain Goldenrod, Decumbent Goldenrod, Mt. Albert Goldenrod
• SORBUS GEMELLA Kovanda – Rowan
• SPHAERALCEA COCCINEA (Nutt.) Rydb. – Scarlet Globemallow, Scarlet Mallow
• SPIGELIA MARILANDICA L. – Woodland Pinkroot, Indian Pink
• SPIRAEA ALPINA Pall.
• SPIRAEA LANATISSIMA Businský
• SPIRAEA LASIOCARPA Kar. et Kir.
• SPIRANTHES ROMANZOFFIANA Cham. – Ladies‘-tresses, Hooded Ladies‘-tresses
• SPIRANTHES SPIRALIS (L.) Chevall. – Autumn Ladie’s Tresses
• STACHYS ANNUA (L.) L. – Annual Hedgenettle
• STACHYS PILOSA Nutt. – Marsh Hedgenettle, Hairy Hedgenettle
• STAPHYLEA PINNATA L. – European Bladdernut
• STENOCEREUS THURBERI (Engelm.) Buxb. – Organpipe Cactus, Organ Pipe Cactus
• SWERTIA PERENNIS L. – Marsh Felwort
• SYMPHORICARPOS ALBUS (L.) S. F. Blake – Snowberry, Common Snowberry, Waxberry, Ghostberry
• SYMPHORICARPOS OCCIDENTALIS Hook. – Buckbrush, Western Snowberry, Wolfberry
• SYMPHYOTRICHUM ERICOIDES (L.) G. L. Nesom – Heath Aster, White Aster, Tufted White Prairie Aster
• SYMPHYOTRICHUM LAEVE (L.) Á. Löve et D. Löve – Smooth Aster, Glaucus Aster
• SYMPHYOTRICHUM LANCEOLATUM (Willd.) G. L. Nesom – Western Willow Aster, Panicled Aster, Siskiyou Aster
• SYMPHYOTRICHUM NOVAE-ANGLIAE (L.) G. L. Nesom – New England Aster, Michaelmas Daisy, Hairy Michaelmas-daisy
• TAXODIUM DISTICHUM (L.) Rich. – Bald Cypress, Southern Cypress, White Cypress, Gulf Cypress, Swamp Cypress
• TELEKIA SPECIOSA (Schreb.) Baumg. – Yellow Oxeye, Heartleaf Oxeye
• TEUCRIUM BETONICUM L’Hér. – Madeira Germander
• TEUCRIUM FRUTICANS L. – Shrubby Germander, Tree Germander
• TEUCRIUM MONTANUM L. – Mountain Germander
• THALICTRUM VENULOSUM Trel. – Veiny Meadow-rue, Early Meadow-rue
• THERMOPSIS RHOMBIFOLIA (Nutt. ex Pursh) Richardson – Golden Bean, Buffalo Bean, Wet Tooth, Buffalo Flower, Prairie Thermopsis
• THLASPI CYPRIUM Bornm. – Cyprus Penny-cress
• THYMUS INTEGER Griseb. – Thyme
• TILLANDSIA USNEOIDES (L.) L. – Spanish Moss, Long Moss, Black Moss, Old Man’s Beard
• TOWNSENDIA HOOKERI Beaman – Hooker’s Townsendia, Hooker’s Townsend Daisy
• TOWNSENDIA PARRYI D. C. Eaton – Parry’s Townsendia, Parry’s Townsend Daisy
• TRADESCANTIA VIRGINIANA L. – Virginia Spiderwort, Spiderwort, White Spiderwort, Widow’s Tears
• TRAPA NATANS L. – Water Chestnut
• TRAUNSTEINERA GLOBOSA (L.) Rchb.
• TRAUNSTEINERA SPHAERICA (M. Bieb.) Schltr.
• TRIADICA SEBIFERA (L.) Small – Chinese Tallow Tree, Florida Aspen, Chicken Tree, Gray Popcorn Tree, Candleberry Tree
• TRILLIUM GRANDIFLORUM (Michx.) Salisb. – White Trillium, Large-flowered Trillium
• TRILLIUM SESSILE L. – Sessile Trillium, Toad Trillium, Toadshade
• TRIODANIS PERFOLIATA (L.) Nieuwl. – Venus‘ Looking-glass, Clasping Venus‘ Looking-glass, Clasping Bellwort, Roundleaved Triodacnis
• ULEX EUROPAEUS L. – Common Gorse
• UMBILICUS HEYLANDIANUS Webb et Berthel.
• UVULARIA GRANDIFLORA Sm. – Large-flowered Bellwort
• VACCINIUM MYRTILLUS L. – Common Bilberry
• VACCINIUM VITIS-IDAEA L. – Cowberry
• VALERIANA SITCHENSIS Bong. – Sitka Valerian, Mountain Heliotrope
• VERATRUM ALBUM L. subsp. ALBUM – European White-hellebore, White False Hellebore, White Veratrum
• VERATRUM NIGRUM L. – Black-hellebore, Black Veratrum
• VERBASCUM PHOENICEUM L. – Purple Mullein
• VINCA MINOR L. – Common Periwinkle, Lesser Periwinkle
• VIOLA ADUNCA Sm. – Early Blue Violet, Hookedspur Violet, Western Dog Violet, Sand Violet
• VIOLA CANADENSIS L. – Canada Violet, Western Canada Violet, Canadian White Violet, White Violet, Tall White Violet
• VIOLA CHEIRANTHIFOLIA Humb. et Bonpl. – Teide Violet
• VIOLA NUTTALLII Pursh – Nuttall’s Violet, Yellow Prairie Violet
• VIOLA ORBICULATA Geyer ex Holz. – Evergreen Yellow Violet, Darkwoods Violet, Round-leaved Violet, Western Round-leaved Violet
• VIOLA PARADOXA Lowe – Madeira Violet
• WALDHEIMIA NIVEA (Hook. f. et Thomson ex C. B. Clarke) Regel
• WALDHEIMIA TRIDACTYLITES Kar. et Kir.
• WALTHERIA INDICA L. – Uhaloa, Boaterbush, Sleepy-morning, Buff-coat
• WOODWARDIA RADICANS (L.) Sm. – European Chain Fern
• XANTHISMA SPINULOSUM (Pursh) D. R. Morgan et R. L. Hartm. – Spiny Golden-aster, Lacy Tansy-aster, Cut-leaf Ironplant, Spiny Goldenweed
• XERANTHEMUM ANNUUM L. – Immortelle, Everlasting
• YUCCA BREVIFOLIA Engelm. – Joshua Tree, Yucca
• YUCCA GLAUCA Nutt. – Yucca, Soapweed, Soapweed Yucca, Plains Yucca, Small Soapweed, Beargrass
• ZIGADENUS ELEGANS Pursh – Mountain Deathcamas, Death Camas, White Camas, Elegant Camas, Alkali Grass
• ZIGADENUS VENENOSUS S. Watson – Death Camas, Meadow Death Camas
• ZIZIA APTERA (A. Gray) Fernald – Heart-leaved Alexaders, Meadow Zizia, Meadow Parsnip
• ZYGOPHYLLUM FONTANESII Webb et Berthel. – Salt-Plant