Oenothera claviformis Torrey & Frémont var. peeblesii Munz, Leafl. W. Bot. 2: 158. 1939 (as clavaeformis); Camissonia claviformis (Torrey & Frémont) P. H. Raven subsp. peeblesii (Munz) P. H. Raven; O. claviformis subsp. peeblesii (Munz) P. H. Raven

Herbs glandular puberulent and strigillose. Stems 5–60 cm. Leaves: blade lateral lobes irregular, well developed, terminal lobe narrowly ovate, to 7 × 3 cm, margins irregularly sinuate-dentate. Flowers opening at sunset; buds without free tips; floral tube orange-brown inside, 3–5.5 mm; petals white, often fading purple, 3–7.5 mm. 2n = 14.

Flowering (Dec–)Jan–Apr. Flat, sandy plains, washes, with Ambrosia dumosa, Carnegiea gigantea, Larrea tridentata, and Prosopis; 100–700 m; Ariz., N.Mex.; Mexico (Sonora).

Subspecies peeblesii is known throughout almost all the southwestern half of Arizona and locally in northwesternmost Sonora, and was recently collected in Grant and Hildago counties in New Mexico. It intergrades with subspp. aurantiaca and rubescens, and hybridizes with all subspecies of Chylismia brevipes.