Oenothera brevipes A. Gray subsp. arizonica P. H. Raven, Univ. Calif. Publ. Bot. 34: 84. 1962; Camissonia brevipes (A. Gray) P. H. Raven subsp. arizonica (P. H. Raven) P. H. Raven

Herbs slender, often branched distally, villous, sometimes also strigillose, at least distally. Flowers: buds individually reflexed, without free tips or with apical free tips less than 1 mm; floral tube orange-brown inside, 3–5 mm; petals often with red dots at base, often fading reddish, 3–8 mm; anthers 2.5–5 mm. Capsules 18–60 mm; pedicel 2.5–5 mm. 2n = 14.

Flowering Feb–Apr. Rocky slopes, flats; of con­servation concern; 70–300 m; Ariz., Calif.

Subspecies arizonica is known from Yuma County, Arizona, and eastern Imperial County, California. It hybridizes with Chylismia claviformis subspp. peeblesii, rubescens, and yumae.