Dudleya cymosa

Dudleya cymosa (*)

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Saxifragales

Familia: Crassulaceae
Subfamilia: Sempervivoideae
Tribus: Sedeae
Genus: Dudleya
Subgenus: D. subg. Dudleya
Species: Dudleya cymosa
Subspecies: D. c. subsp. agourensis – D. c. subsp. crebrifolia – D. c. subsp. cymosa – D. c. subsp. marcescens – D. c. subsp. ovatifolia – D. c. subsp. paniculata – D. c. subsp. pumila
Name

Dudleya cymosa (Lem.) Britton & Rose, Bull. New York Bot. Gard. 3: 21 (1903).
References
Primary references

Britton, N.L. & Rose, J.N., 1903. Bulletin of the New York Botanical Garden 3: 21.
Links

Hassler, M. 2019. Dudleya cymosa. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2019. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2019 Dec 01. Reference page.
International Plant Names Index. 2019. Dudleya cymosa. Published online. Accessed: Dec 01 2019.
Govaerts, R. et al. 2019. Dudleya cymosa in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2019 Dec 01. Reference page.
Tropicos.org 2019. Dudleya cymosa. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Dec 01.
USDA, ARS, Germplasm Resources Information Network. Dudleya cymosa in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 07-Oct-06.

Vernacular names

Dudleya cymosa is a species complex of succulent plants known by the common name: canyon liveforever.[1][2] It is a loosely defined species with a diverse number of subspecies, many often varying highly in morphology, distribution, and habitat.[3]

Description

It is a distinctive plant sending up erect red-orange stems from a gray-green basal rosette. The small yellowish-red thimble-shaped flowers top the stems in a cyme inflorescence. Some subspecies are considered threatened locally.
Subspecies

Recognized[4] Dudleya cymosa subspecies:

Dudleya cymosa subsp. agourensis K.M. Nakai - (Agoura Hills dudleya)
Dudleya cymosa subsp. crebrifolia K.M. Nakai & Verity - (San Gabriel River dudleya)
Dudleya cymosa subsp. costatifolia Bartel & Shevock - (Pierpoint springs dudleya)
Dudleya cymosa subsp. cymosa (Lem.) Britton & Rose - (Canyon liveforever)
Dudleya cymosa subsp. marcescens Moran - (Marcescent dudleya)
Dudleya cymosa. subsp. ovatifolia - (Santa Monica Mountains dudleya)
Dudleya cymosa subsp. paniculata (Jeps.) K.M. Nakai - (Diablo range dudleya)
Dudleya cymosa subsp. pumila (Rose) K.M. Nakai - (Low canyon dudleya)

The subspecies marcescens[5] and ovatifolia[6] are federally listed as threatened species of the United States.
Butterfly habitat

Dudleya cymosa is the larval host plant for the Sonoran blue butterfly, Philotes sonorensis (Lycaenidae)
Basal rosette, erect stems, and inflorescences
Notes

New N. Amer. Crassul. 21. 1903 Sep
Bull. New York Bot. Gard. 3:21. 1903 Nov
McCabe, Stephen Ward (26 September 2019). "Succulent Poaching, Conservation,and the Mainland Dudleyas". Youtube. CNPS Santa Clara Valley Chapter.
"Dudleya cymosa". Global Biodiversity Information Facility.
USFWS. ssp. marcescens. Species Profile.

USFWS. ssp. ovatifolia. Species Profile.

References

Thomson, Paul H. (1993). Dudleya and Hasseanthus handbook. Bonsall, CA: Bonsall Publication. ISBN 978-0-9602066-5-0.
C.Michael Hogan, ed. 2010. Dudleya cymosa. Encyclopedia of Life.