Lemmon ex Greene
Allium peninsulare is a species of wild onion. It is known by such common names as Mexicali onion and Peninsula onion; the latter reflecting the meaning of the botanical name. It is widespread in California, USA, where it grows in the California Coast Ranges, Sierra Nevada foothills, and Peninsular Ranges, the range extending south into the northernmost part of Baja California, Mexico, and north into southern Oregon.
Allium peninsulare is usually found in Valley Grassland, Foothill Woodland, and Coastal Chaparral at elevations up to 1100 m. This onion grows from a bulb 8–15 mm wide and has two to three channeled to more or less cylindrical leaves. Between May and July, it sends up a 12–45 cm scape topped with an umbel of 5–35 flowers, each on an 0.8–4 cm pedicel. The flowers are red-purple and have six triangular tepals. The three inner tepals are smaller than the outer ones and havedentations along the margins.
- A. peninsulare var. franciscanum McNeal & Ownbey --- leaves ached; stigma, unlobed or obscurely 3- lobed --- found only near San Francisco Bay
- A. peninsulare var. peninsulare—leaves straight, stigma strongly 3- lobed --- widespread from Baja California to Oregon
- "Allium peninsulare", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2012-05-29
- Flora of North America, v 26 p 265, Allium peninsulare
- Jepson Manual Treatment - Allium peninsulare
- Greene, Edward Lee. 1888. Pittonia 1(11): 165.
- McNeal, Dale W. & F. Marion Ownbey. 1992. Phytologia 73(4): 310–311.
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