Chylismia lancifolia A. Heller, Muhlenbergia 2: 226. 1906 (as Chylisma); Camissonia claviformis (Torrey & Frémont) P. H. Raven subsp. lancifolia (A. Heller) P. H. Raven; C. claviformis var. lancifolia (A. Heller) Cronquist; Oenothera claviformis Torrey & Frémont subsp. lancifolia (A. Heller) P. H. Raven

Herbs strigillose proximally, glabrous and often glaucous distally. Stems 5–60 cm. Leaves: blade lateral lobes usually poorly developed or absent, terminal lobe lanceolate, to 5 × 2.8 cm, margins irregularly serrate-dentate. Flowers usually opening at sunset; buds usually without free tips, sometimes with apical free tips less than 1 mm; floral tube orange-brown inside, 3.5–6 mm; petals bright yellow, sometimes red-dotted in proximal 1/2, fading pale orange, 3.5–7 mm. 2n = 14.

Flowering Apr–Jul. Sandy slopes and flats, often with Artemisia tridentata or Ericameria; 600–1700(–1900) m; Calif., Nev.

Subspecies lancifolia is known from east of the Sierra Nevada in southern Mono and Inyo counties, California, and adjacent Mineral County, Nevada.