Syn.: Veronica alpina subsp. wormskjoldii (Roem. et Schult.) Elenevsky, Veronica alpina var. wormskjoldii (Roem. et Schult.) Hook.
Čeleď: Plantaginaceae – jitrocelovité
VERONICA WORMSKJOLDII Roem. et Schult. – rozrazil / veronika
Oblast Skalistých hor
VIOLA ADUNCA Sm. – violka / fialka
Syn.: Lophion aduncum (Sm.) Nieuwl. et Lunell, Viola bellidifolia Greene, Viola canina var. adunca (Sm.) A. Gray, Viola clarkiae A. Nelson, Viola cordulata Greene, Viola demissa Greene, Viola desertorum Greene, Viola longipes Nutt., Viola mamillata Greene, Viola montanensis Rydb., Viola odontophora Rydb, Viola oxyceras (S. Watson) Greene, Viola oxysepala Greene, Viola retroscabra Greene, Viola silvatica var. adunca Kurtz, Viola tidestromii Greene
Čeleď: Violaceae Batsch – violkovité
VIOLA CANADENSIS L. – violka kanadská / fialka
Syn.: Lophion canadense (L.) Spach, Lophion rydbergii (Greene) Nieuwl. et Lunell, Viola geminiflora Greene, Viola muriculata Greene, Viola neomexicana Greene, Viola rydbergii Greene
Čeleď: Violaceae Batsch – violkovité
VIOLA LOBATA Benth. – violka / fialka
Syn.: Viola montana Kellogg, Viola sequoiensis Kellogg
Čeleď: Violaceae Batsch – violkovité
VIOLA NUTTALLII Pursh – violka / fialka
Syn.: Crocion nuttallii Nieuwl. et Lunell
Čeleď: Violaceae Batsch – violkovité
VIOLA ORBICULATA Geyer ex Holz. – violka / fialka
Syn.: Viola sarmentosa var. orbiculata A. Gray, Viola sempervirens var. orbiculata (Geyer ex Holz.) J. K. Henry, Viola sempervirens var. orbiculoides M. S. Baker
Čeleď: Violaceae Batsch – violkovité
XANTHISMA SPINULOSUM (Pursh) D. R. Morgan et R. L. Hartm.
Syn.: Amellus spinulosus Pursh, Aster pinnatifidus (Hook.) Kuntze, Aster spinuliger (A. Gray) Kuntze, Chrysopsis lamarckii (Cass.) Nutt., Dieteria spinulosa (Pursh) Nutt., Eriocarpum australe Greene, Eriocarpum spinulosum (Pursh) Greene, Haplopappus spinulosus (Pursh) DC., Machaeranthera australis (Greene) Shinners, Machaeranthera laevis (Wooton et Standl.) Shinners, Machaeranthera pinnata (Nutt.) Shinners, Machaeranthera pinnatifida var. pinnatifida (Hook.) Shinners, Machaeranthera pinnatifida subsp. pinnatifida (Hook.) Shinners, Sideranthus australe (Greene) Rydb., Sideranthus australis (Greene) Rydb., Sideranthus cotula Small, Sideranthus laevis Wooton et Standl., Sideranthus machaeranthera Small, Sideranthus puberulus Rydb., Sideranthus spinulosus (Pursh) Sweet ex Rydb., Starkea pinnata Nutt.
Čeleď: Asteraceae – hvězdnicovité
XEROPHYLLUM TENAX (Pursh) Nutt.
Syn.: Helonias tenax Pursh, Melanthium spicatum Walter, nom. illeg., Xerophyllum douglasii S. Watson
Čeleď: Melanthiaceae Batsch – kýchavicovité
ZIGADENUS ELEGANS Pursh
Syn.: Anticlea alpina A. Heller, Anticlea chlorantha (Richardson) Rydberg, Anticlea coloradensis (Rydberg) Rydberg, Anticlea elegans (Pursh) Rydberg, Anticlea glauca (Nuttall) Kunth, Anticlea gracilenta (Greene) R. R. Gates, Anticlea longa (Greene) A. Heller, Anticlea mohinorensis (Greenman) R. R. Gates, Melanthium glaucum Nuttall, Zigadenus alpinus Blankinship, Zigadenus chloranthus Richardson, Zigadenus coloradensis Rydberg, Zigadenus dilatatus Greene, Zigadenus elegans subsp. glaucus (Nuttall) Hultén, Zigadenus elegans var. glaucus (Nuttall) Preece ex Cronquist, Zigadenus glaucus (Nuttall) Nuttall, Zigadenus gracilentus Greene, Zigadenus longus Greene, Zigadenus mohinorensis Greenman, Zigadenus washakie A. Nelson
Čeleď: Melanthiaceae Batsch – kýchavicovité
ZIGADENUS VENENOSUS S. Watson
Syn.: Toxicoscordion venenosum (S. Watson) Rydb.
Čeleď: Melanthiaceae Batsch – kýchavicovité
ZOSTERA MARINA L. – vocha mořská
Syn.: Alga marina (L.) Lam., Zostera latifolia (Morong) Morong, Zostera marina var. latifolia Morong, Zostera marina var. stenophylla (Raf.) Asch. et Graebn., Zostera maritima Gaertn., Zostera oregana S. Watson, Zostera pacifica S. Watson, Zostera stenophylla Raf.
Česká jména: vocha mořská (Presl 1846)
Čeleď: Zosteraceae Dumort. – vochovité