Allium sanbornii

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 sanbornii
Varietas: A. s. var. congdonii – A. s. var. sanbornii
Name

Allium sanbornii Alph.Wood
References

Wood, A., Proceedings of the Academy of Natural Sciences of Philadelphia. Philadelphia, PA 20:171. 1868

Links

Govaerts, R. et al. 2018. Allium sanbornii in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2018 Jul. 24. Reference page.
Hassler, M. 2018. Allium sanbornii. 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. 2018. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2018 Jul. 24. Reference page.
International Plant Names Index. 2018. Allium sanbornii. Published online. Accessed: Jul. 24 2018.
USDA, ARS, Germplasm Resources Information Network. Allium sanbornii in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Allium sanbornii is a North American species of wild onion known by the common name Sanborn's onion.[3] It is native to northern California and southwestern Oregon.[4] It grows in the serpentine soils of the southern Cascade Range and northern Sierra Nevada foothills.[5][6]

Allium sanbornii produces a reddish-brown bulb up to about 2.5 cm (1 in) long. Scape up to 60 cm (24 in) long, bearing a single cylindrical leaf which is about the same length. The umbel contains as many as 150 small flowers, each with tepals less than a centimeter long, pink to white with darker red midveins. Anthers are yellow or purple; pollen yellow or white.[6][7][8]

Varieties[3][9]

Allium sanbornii var. congdonii Jeps. - from Nevada County to Mariposa County
Allium sanbornii var. sanbornii - from Shasta County to Mariposa County in California; Jackson + Josephine Counties in Oregon

formerly included[3][10]

Allium sanbornii var. jepsonii Ownbey & Aase ex Traub, now called Allium jepsonii (Ownbey & Aase ex Traub) S.S.Denison & McNeal
Allium sanbornii var. tuolumnense Ownbey & Aase ex Traub, now called Allium tuolumnense (Ownbey & Aase ex Traub) S.S.Denison & McNeal

References

photo of herbarium specimen at Jepson Herbarium, University of California @ Berkeley, collected in 2005 in Nevada County, California
"NatureServe Explorer 2.0".
Kew World Checklist of Selected Plant Families
Biota of North America Program 2014 county distribution map
USDA Plants Profile
Flora of North America, Allium sanbornii
Jepson Manual Treatment
Wood, Alphonso. 1868. Proceedings of the Academy of Natural Sciences of Philadelphia 20(6): 171.
Calflora Taxon Report 229, Allium sanbornii Alph. Wood, Sanborn's onion
Denison, S.S. & McNeal, Dale W. 1989. Madroño 36(2): 127-128