''Toxicoscordion'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of ...

s in the family

Melanthiaceae Melanthiaceae, also called the bunchflower family, is a family of flowering herbaceous perennial plants native to the Northern Hemisphere. Along with many other lilioid monocots, early authors considered members of this family to belong to ...

, tribe Melanthieae, first described as a genus in 1903. The genus is mainly distributed in the midwestern United States and western North America, with some species in western Canada and northern Mexico.Kew World Checklist of Selected Plant Families
/ref> Molecular phylogenetic studies in the 21st century have resulted in number of changes to placements within this tribe. ''Toxicoscordion'' was long submerged into the genus '' Zigadenus'', but its separate position in the phylogeny of the Melanthieae has been confirmed. Members of ''Toxicoscordion'' may also be distinguished from other similar members of the deathcamas tribe by the presence of narrow, clawed

tepal A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals. This may be because the parts of the perianth are undifferentiated (i.e. of very ...

s with a single, conspicuous, rounded gland. ; SpeciesBiota of North America Program 2013 county distribution maps
/ref> * '' Toxicoscordion brevibracteatum'' (syn. ''Zigadenus brevibracteatus'') - desert deathcamas -

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

, Sonora, California * '' Toxicoscordion exaltatum'' (syn. ''Zigadenus exaltatus'') - giant deathcamas - California, Nevada * '' Toxicoscordion fontanum'' (syn. ''Zigadenus fontanus'') - smallflower deathcamas - California * '' Toxicoscordion fremontii'' (syn. ''Zigadenus fremontii'') - Frèmont's deathcamas, star zigadene (several varieties) -

, Oregon, California * '' Toxicoscordion micranthum'' (syn. ''Zigadenus micranthus'') - smallflower deathcamas - Oregon, California * '' Toxicoscordion nuttallii'' (syn. ''Zigadenus nuttallii'') - Nuttall's deathcamas - SC United States * '' Toxicoscordion paniculatum'' (syn. ''Zigadenus paniculatus'') - foothill deathcamas, sand-corn - W United States * '' Toxicoscordion venenosum'' (syn. ''Zigadenus venenosus'') - death camas, meadow deathcamas - W Canada, W USA,

References

{{Taxonbar, from=Q7830414 Melanthiaceae genera Flora of North America