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Photo is of parent taxon

Peirson's clavate fruit primrose

Photo is of parent taxon
Habit Herbs villous, at least proximally, rarely strigillose or glandular puberulent. Herbs glandular puberulent and strigillose.
Stems

5–60 cm.

5–60 cm.

Leaves

blade lateral lobes usually well developed, terminal lobe narrowly ovate, to 9 × 3.5 cm, margins irregularly sinuate-dentate.

blade lateral lobes irregular, well developed, terminal lobe narrowly ovate, to 7 × 3 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.

opening at sunset;

buds without free tips;

floral tube orange-brown inside, 3–5.5 mm;

petals white, often fading purple, 3–7.5 mm.

2n

= 14.

= 14.

Chylismia claviformis subsp. peirsonii

Chylismia claviformis subsp. peeblesii

Phenology Flowering Feb–Apr. Flowering (Dec–)Jan–Apr.
Habitat Sandy flats or washes, with Ambrosia dumosa, Fouquieria splendens, and Larrea. Flat, sandy plains, washes, with Ambrosia dumosa, Carnegiea gigantea, Larrea tridentata, and Prosopis.
Elevation -70–400 m. (-200–1300 ft.) 100–700 m. (300–2300 ft.)
Distribution
from FNA
CA; Mexico (Baja California)
[BONAP county map]
from FNA
AZ; NM; Mexico (Sonora)
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Subspecies peeblesii is known throughout almost all the southwestern half of Arizona and locally in northwesternmost Sonora, and was recently collected in Grant and Hildago counties in New Mexico. It intergrades with subspp. aurantiaca and rubescens, and hybridizes with all subspecies of Chylismia brevipes.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia > Chylismia claviformis Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia > Chylismia claviformis
Sibling taxa
C. claviformis subsp. aurantiaca, C. claviformis subsp. claviformis, C. claviformis subsp. cruciformis, C. claviformis subsp. funerea, C. claviformis subsp. integrior, C. claviformis subsp. lancifolia, C. claviformis subsp. peeblesii, C. claviformis subsp. rubescens, C. claviformis subsp. yumae
C. claviformis subsp. aurantiaca, C. claviformis subsp. claviformis, C. claviformis subsp. cruciformis, C. claviformis subsp. funerea, C. claviformis subsp. integrior, C. claviformis subsp. lancifolia, C. claviformis subsp. peirsonii, C. claviformis subsp. rubescens, C. claviformis subsp. yumae
Synonyms Oenothera claviformis var. peirsonii, Camissonia claviformis subsp. peirsonii, C. peirsonii, O. claviformis subsp. peirsonii Oenothera claviformis var. peeblesii, Camissonia claviformis subsp. peeblesii, O. claviformis subsp. peeblesii
Name authority (Munz) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 207. (2007) (Munz) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 206. (2007)
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