Chylismia claviformis subsp. peirsonii

(Munz) W. L. Wagner & Hoch

Syst. Bot. Monogr. 83: 207. 2007.

Basionym: Oenothera claviformis var. peirsonii Munz Amer. J. Bot. 15: 238. 1928
Synonyms: Camissonia claviformis subsp. peirsonii (Munz) P. H. Raven Chylismia peirsonii (Munz) D. A. Johansen O. claviformis subsp. peirsonii (Munz) P. H. Raven
Treatment appears in FNA Volume 10.

Herbs villous, at least proximally, rarely strigillose or glandular puberulent. Stems 5–60 cm. Leaves: blade lateral lobes usually well developed, terminal lobe narrowly ovate, to 9 × 3.5 cm, margins irregularly sinuate-dentate. Flowers opening at sunset; buds with conspicuous, subapical free tips; floral tube orange-brown inside, 2.5–4.5 mm; petals usually yellow, rarely white, not changing color in fading, 4.5–7 mm. 2n = 14.


Phenology: Flowering Feb–Apr.
Habitat: Sandy flats or washes, with Ambrosia dumosa, Fouquieria splendens, and Larrea.
Elevation: -70–400 m.

Distribution

Calif., Mexico (Baja California).

Discussion

Subspecies peirsonii is known from east of the Salton Sea and Imperial Valley in Imperial and San Diego counties, California, and in northeastern Baja California to the Gulf of California. It intergrades with subsp. aurantiaca.

Selected References

None.

Lower Taxa

None.
Warren L. Wagner +
(Munz) W. L. Wagner & Hoch +
Oenothera claviformis var. peirsonii +
Calif. +  and Mexico (Baja California). +
-70–400 m. +
Sandy flats or washes, with Ambrosia dumosa, Fouquieria splendens, and Larrea. +
Flowering Feb–Apr. +
Syst. Bot. Monogr. +
Camissonia claviformis subsp. peirsonii +, Chylismia peirsonii +  and O. claviformis subsp. peirsonii +
Chylismia claviformis subsp. peirsonii +
Chylismia claviformis +
subspecies +