Herbs perennial, strigillose and glandular puberulent; from a narrow taproot. Stems erect, usually branched several cm belowground or near base, sometimes also branched distally, 25–100 cm. Leaves in a basal rosette and cauline, basal 1–6.5 (–13) × 0.4–1.5 cm, blade narrowly oblanceolate; cauline 0.5–3 (–6.5) × 0.1–1.1 cm, blade very narrowly elliptic, narrowly lanceolate, or linear, margins sinuate-dentate to subentire. Flowers 4-merous, slightly zygomorphic, opening near sunset; floral-tube 3–8.5 mm; sepals 3–9 mm; petals white, fading pink to red, slightly unequal, elliptic-obovate, 4–10 mm, clawed; filaments 2–4.5 mm, anthers 2–4 mm, pollen 85–100% fertile; style 6.5–15 mm, stigma exserted beyond anthers at anthesis. Capsules erect, sometimes reflexed in age, fusiform, sometimes slightly narrowed in proximal 1/3, 5.5–13 × 1–2.5 mm, valves with inconspicuous raised midrib; sessile. Seeds (1 or) 2–4, yellowish or light-brown, 1.5–2.5 × 0.8–1.3 mm. 2n = 14.

Phenology: Flowering May–Aug.
Habitat: Washes, sandy canyon sides.
Elevation: 600–1400 m.

Distribution

• Generated Map
• Legacy Map

Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Nuevo León)

Discussion

Oenothera boquillensis has a narrow distribution in canyons from near the Rio Grande River in southern Brewster County southward into Mexico from central Chihuahua, Coahuila, and western Nuevo León. P. H. Raven and D. P. Gregory (1972[1973]) determined O. boquillensis to be self-incompatible.

Selected References

None.

Lower Taxa

None.