Oenothera cardiophylla Torrey subsp. robusta P. H. Raven, Univ. Calif. Publ. Bot. 34: 79. 1962; Camissonia cardiophylla (Torrey) P. H. Raven subsp. robusta (P. H. Raven) P. H. Raven

Herbs glandular puberulent throughout, often also sparsely villous. Flowers: floral tube 9–14 mm; petals 7–11 mm; style 14–20 mm, stigma usually exserted beyond anthers at anthesis. 2n = 14.

Flowering Mar–May. Rocky borders of washes and hillsides, with Ambrosia dumosa and Larrea tridentata; 600–1400 m; Calif.

Subspecies robusta is known from the western and southern margins of Death Valley, Inyo County.