Oenothera scapoidea Torrey &A. Gray subsp. macrocarpa P. H. Raven, Univ. Calif. Publ. Bot. 34: 95. 1962; Camissonia bairdii S. L. Welsh; C. scapoidea (Torrey & A. Gray) P. H. Raven subsp. macrocarpa (P. H. Raven) P. H. Raven; C. scapoidea var. macrocarpa (P. H. Raven) Cronquist

Leaves: blade usually unlobed, rarely pinnately lobed with few, small lateral lobes, terminal lobe ovate, 1.7–3.5 × 1–1.5 cm, margins subentire, oil cells on abaxial surface inconspicuous, usually pale yellowish brown, rarely darker. Flowers: petals 1.5–2 mm. Capsules 25–50 mm.

Flowering May–Jun. On detrital clay knobs, gravelly flats; of conservation concern; 1500–2000 m; Ariz.

Subspecies macrocarpa is known from northern Apache and Navajo counties and northeastern Coconino County.