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Allium tribracteatum - Flickr - pellaea

Classification System: APG IV

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

Familia: Amaryllidaceae
Subfamilia: Allioideae
Tribus: Allieae
Genus: Allium
Species: Allium tribracteatum

Allium tribracteatum Torr., 1857

Allium idahoense Traub
Allium tolmiei Baker ex J.M.Coult., nom. illeg.

Native distribution areas:

Continental: Northern America
Regional: Southwestern USA

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

Torrey, J., Pacif. Railr. Rep. Parke, Bot. 4(5): 148 1857.
USDA, NRCS. 2006. The PLANTS Database, 6 March 2006 ( Data compiled from various sources by Mark W. Skinner. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.


Govaerts, R. et al. 2018. Allium tribracteatum in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2018 Jul. 25. Reference page.
International Plant Names Index. 2018. Allium tribracteatum. Published online. Accessed: Jul. 25 2018.

Vernacular names
English: threebract onion

Allium tribracteatum, known by the common name Threebract onion,[2] is a species of wild onion[3] found in California.

Distribution and habitat

The plant is endemic to California, where it is known only from the slopes of the Sierra Nevada in Tuolumne and Calaveras Counties.[3][4][5]

Allium tribracteatum is a small onion plant producing a stem only a few centimeters long from an oval-shaped bulb. There are two leaves which are usually much longer than the stem. The inflorescence contains up to 30 petite white to purple flowers, each less than a centimeter long. Tepals are white to pink with red or purple midveins; anthers purple; pollen gray.[3][6][4] Flowers bloom March to May.[4]

Kew World Checklist of Selected Plant Families
CalFlora taxon report 237, Allium tribracteatum Torrey (three bracted onion, threebract onion)
Jepson Treament, University of California, Berkeley . accessed 3.20.2013
Flora of North America v 26 p 269, Allium tribracteatum
United States department of Agriculture Plants Profile, Allium tribracteatum
Torrey, John. 1857. Reports of explorations and surveys : to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean, made under the direction of the Secretary of War 4(5): 148.

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