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Yellowflower onion

Allium coryi

Also called Cory's Onion, Sperry's Yellow Onion

Allium coryi is a small bulbous onion native to rocky slopes in trans-Pecos Texas, sometimes grown as an ornamental. It needs full sun, excellent drainage and a dry rest in summer, much like other desert-adapted bulbs.

Family
Amaryllidaceae (Daffodil & onion family)
Grows as
Bulb
Light
Full sun
Water
Water moderately while growing in spring, then keep dry in summer and avoid soggy soil.
Soil
Gritty, fast-draining soil or mineral-rich mix with grit.
Temperature
Hardy to about -10 °C; tolerates hot, dry summers.
How easy
Moderate
Edible
Yes, some parts
Native range
SW. Texas
Climate
subtropical

About

Allium coryi, common name yellowflower onion, is a plant species endemic to trans-Pecos Texas, but sometimes cultivated as an ornamental elsewhere. It is reported in the wild from only five counties: Brewster, Presidio, Jeff Davis, Pecos and Terrell. Some of the populations lie inside Big Bend National Park.

Allium coryi grows on rocky slopes and plains at elevations of 800–1400 m. It produces egg-shaped bulbs up to 2 cm long. Flowers are bright yellow, up to 10 mm across; anthers and pollen are yellow.

Other Allium plants

South Idaho onion · Abrams' allium · Allium aciphyllum · Tapertip onion · Allium aeginiense · Allium aflatunense · Allium agrigentinum · Allium alabasicum · Allium albotunicatum · Allium alibile · Altai Onion · Allium altissimum

Text excerpted from the Wikipedia article Allium coryi by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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