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.Flora of North America v 26, p 239, Allium coryiBONAP (Biota of North America Program), floristic synthesis, Allium coryi

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.photo of herbarium specimen at Missouri Botanical Garden, isotype of Allium coryiJones, Marcus Eugene. 1930. Contributions to Western Botany 17: 21.Correll, D. S. & M. C. Johnston. 1970. Manual of the Vascular Plants of Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.

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