Rare Plant Field Guide

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Brassicaceae (Mustard Family) Look Alikes: Extremely large buds and flowers with spatulate petals strongly differentiated into blade and claw make this species distinctive. Flowering/Fruiting Period: Unknown. Habitat: Actual habitat unknown but thought to be along margins of rivers and lakes. Elev. 7500 ft. Approximation of habitat by D. Kuntz Distribution: Colorado endemic. Exact location of the type (and only) collection from 1875 is unknown; assumed to be somewhere around the San Luis Lakes in the San Luis Valley or along the Rio Grande. Based on this assumption, possibly Alamosa, Saguache, Rio Grande or Mineral Co. Now thought to be extinct. References: McArthur 1980; Stuckey 1972. Please send comments to: Colorado Natural Heritage Program 254 General Services Building, Colorado State University · Fort Collins, CO 80523 · (970) 491-2992