Allium tuolumnense

Allium tuolumnense is a rare species of wild onion, known by the common name Rawhide Hill onion.[1]

Allium tuolumnense
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

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.[2]

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.[2][3]

See also

References
  1. Calflora database — Allium tuolumnense. Accessed 2013-02-05.
  2. eFloras.org. Accessed 2013-02-05.
  3. Denison, S. S. & McNeal, Dale W. 1989. Madroño 36(2): 128.


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