familyOnagraceae
subfamilyOnagraceae subfam. Onagroideae
genusChylismia
sectionChylismia sect. Chylismia
speciesChylismia claviformis
subspeciesChylismia claviformis subsp. rubescens
Chylismia claviformis subsp. rubescens
Syst. Bot. Monogr. 83: 207. 2007.
Basionym: Oenothera claviformis subsp. rubescens P. H. Raven Univ. Calif. Publ. Bot. 34: 103. 1962
Synonyms: Camissonia claviformis subsp. rubescens (P. H. Raven) P. H. Raven
Treatment appears in FNA Volume 10.
Herbs villous, at least proximally, also glandular puberulent. Stems 5–40 cm. Leaves: blade lateral lobes poorly developed, small or absent, terminal lobe lanceolate, to 4 × 2 cm, margins irregularly dentate. Flowers opening at sunset; buds with conspicuous, subapical free tips; floral tube orange-brown inside, 3.5–5 mm; petals yellow, fading brick red, 3–5 mm. 2n = 14.
Phenology: Flowering Mar–Apr.
Habitat: Sandy flats, with Ambrosia dumosa, Carnegiea gigantea, and Larrea.
Elevation: 60–400 m.
Distribution
Ariz., Mexico (Sonora).
Discussion
Subspecies rubescens is known from western Maricopa, eastern Pima, and southeastern Yuma counties, Arizona, and northwestern Sonora. It intergrades with subsp. peeblesii and hybridizes with Chylismia brevipes subsp. arizonica.
Selected References
None.
Lower Taxa
None.