Difference between revisions of "Oenothera boquillensis"
Syst. Bot. Monogr. 83: 211. 2007.
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|tribe=Onagraceae tribe Onagreae | |tribe=Onagraceae tribe Onagreae | ||
Latest revision as of 11:33, 9 May 2022
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
Tex., Mexico (Chihuahua, Coahuila, 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.