Allium tuolumnense

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Ordo: Asparagales

Familia: Amaryllidaceae
Subfamilia: Allioideae
Tribus: Allieae
Genus: Allium
Species: Allium tuolumnense
Name

Allium tuolumnense (Ownbey & Aase) S.S.Denison & McNeal; 1989
Synonyms

Allium sanbornii var. tuolumnense Ownbey & Aase ex Traub

Distribution
Native distribution areas:

Continental: Northern America
Regional: Southwestern USA
California

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References

Denison, S.S. & McNeal, D.W., Madroño 36: 128 1989.
USDA, NRCS. 2006. The PLANTS Database, 6 March 2006 (http://plants.usda.gov). Data compiled from various sources by Mark W. Skinner. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
USDA NRCS PLANTS Profile

Links

Govaerts, R. et al. 2018. Allium tuolumnense in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2018 Jul. 25. Reference page.
International Plant Names Index. 2018. Allium tuolumnense. Published online. Accessed: Jul. 25 2018. Reference page.

Vernacular names
English: Rawhide Hill onion

Allium tuolumnense is a rare species of wild onion, known by the common name Rawhide Hill onion.[2]

It is endemic to Tuolumne County, California, where it is known only from a small section of the Sierra Nevada foothills at Rawhide Hill and the Red Hills. It is a plant of serpentine soils.
Description

This onion, Allium tuolumnense, grows from a reddish-brown bulb one to two centimeters long, producing a slender erect stem up to 50 centimetres (20 in) tall and usually a single leaf approximately the same length.[3]

The stem is topped with a hemispheric inflorescence holding 20 to 60 flowers, each on a pedicel one or two centimeters long. Each flower is just under a centimeter wide when fully open, with six white or pink oval-shaped tepals. There are six stamens and the ovary has six pointed crests.[3][4]
See also

Serpentine soils
Red Hills (Tuolumne County)

References

NatureServe (5 May 2023). "Allium tuolumnense". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 15 May 2023.
Calflora database — Allium tuolumnense. Accessed 2013-02-05.
eFloras.org. Accessed 2013-02-05.
Denison, S. S. & McNeal, Dale W. 1989. Madroño 36(2): 128.