There are approximately 43 species and subspecies in this genus: V. advena · V. alazanensis · V. americana · V. anitana · V. arguta · V. badensis · V. bassensis · V. compressa · V. cristellaroides · V. debilis · V. exilis · V. flabelloides · V. gaultina · V. gracilis · V. knighti · V. kochii · V. laminata · V. legumen · V. legumen arcuata · V. legumen elegans · V. linearis · V. listi · V. macilenta · V. modesta · V. mosquensis · V. obtusicosta · V. olssoni · V. peregrina · V. phragmifera · V. plummerae · V. prima · V. recta · V. riedeli · V. robusta · V. simondsi · V. simplex · V. sparsicostata · V. spinigera · V. striolata · V. subelegans · V. sublituus · V. suturalis · V. vertebralis
There are approximately 36 species, subspecies, varieties, forms, and cultivars in this genus: C. aegyptiaca · C. alata · C. axillaris · C. brevidens · C. calycina · C. caricea · C. dewildemaniana oxyrhyncha · C. distantiflora · C. ferruginea · C. goreensis · C. grandibracteata · C. greenwayii · C. hyssopifolia · C. incana · C. laburnifolia · C. lathroides · C. matourensis · C. mexicana · C. ochroleuca · C. orixensis · C. podocarpa · C. polyphylla · C. polysperma · C. pumila · C. purshii · C. pycnostachya · C. quercetorum · C. retusa · C. rosenii · C. sagittalis · C. senegalensis · C. sonorensis · C. stipularis · C. uncinella · C. vallicola · C. verrucosa
Accessed through GBIF Data Portal November 24, 2007:
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