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Allium tuolumnense
Conservation status
	; Imperiled (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Amaryllidaceae
Subfamily:	Allioideae
Genus:	Allium
Species:	A. tuolumnense
Binomial name
	Allium tuolumnense; (Ownbey & Aase ex Traub) S. Denison & McNeal
Synonyms
	Allium sanbornii var. tuolumnense Ownbey & Aase ex Traub

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]

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.
^ ^a ^b eFloras.org. Accessed 2013-02-05.
^ Denison, S. S. & McNeal, Dale W. 1989. Madroño 36(2): 128.