Syn.: Viola emirnensis Bojer, Viola zongia Tul.
Family: Violaceae Batsch

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
Family: Violaceae Batsch

Syn.: Lophion canadense (L.) Spach, Lophion rydbergii (Greene) Nieuwl. et Lunell, Viola geminiflora Greene, Viola muriculata Greene, Viola neomexicana Greene, Viola rydbergii Greene
Family: Violaceae Batsch

Syn.: Mnemion cheiranthifolium (Humb. et Bonpl.) Webb et Berthel., Viola teydea Berthel.
Family: Violaceae Batsch

Syn.: Crocion nuttallii Nieuwl. et Lunell
Family: Violaceae Batsch

Syn.: Viola sarmentosa var. orbiculata A. Gray, Viola sempervirens var. orbiculata (Geyer ex Holz.) J. K. Henry, Viola sempervirens var. orbiculoides M. S. Baker
Family: Violaceae Batsch

Family: Violaceae Batsch

Syn.: Allardia nivea Hook. f. et Thomson ex C. B. Clarke
Family: Asteraceae Bercht. et J. Presl

Syn.: Allardia tridactylites (Kar. et Kir.) Sch. Bip.
Family: Asteraceae Bercht. et J. Presl

Syn.: Waltheria africana K. Schum., Waltheria americana L., Waltheria angustifolia L., Waltheria arborescens Cav., Waltheria corchorifolia Pers., Waltheria detonsa A. Gray, Waltheria elliptica Cav., Waltheria erioclada DC., Waltheria guineensis K. Schum., Waltheria indica var. americana (L.) R. Br. ex Hosaka, Waltheria laevis Schrank, Waltheria makinoi Hayata, Waltheria wildii Suess.
Family: Malvaceae Juss.; Sterculiaceae Vent.

Syn.: Werneria disticha Kunth, Werneria dombeyana (Wedd.) Hieron., Werneria mocinniana DC., Werneria nubigena var. dombeyana Wedd., Werneria stuebelii Hieron.
Family: Asteraceae Bercht. et J. Presl

Syn.: Blechnum radicans L.
Family: Blechnaceae (C. Presl) Copel.

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.
Family: Asteraceae Bercht. et J. Presl

Syn.: Xeranthemum squarrosum Boiss.
Family: Asteraceae Bercht. et J. Presl

Syn.: Cleistoyucca arborescens (Torr.) Eastw., Clistoyucca arborescens (Torr.) Trel., Clistoyucca brevifolia (Engelm.) Rydb., Sarcoyucca brevifolia (Engelm.) Linding., Yucca arborescens (Torr.) Trel., Yucca draconis var. arborescens Torr., Yucca jaegeriana (McKelvey) L. W. Lenz
Family: Agavaceae Endl.; Asparagaceae Juss.