Oenothera podocarpa |
Oenothera curtissii |
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Curtiss' evening primrose |
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Habit | Herbs annual, villous proximally, glabrate, strigillose and/or glandular puberulent distally, leaves glabrate to densely villous, glabrate in age; from stout taproot. | Herbs biennial or short-lived perennial, densely to sparsely strigillose, sometimes also sparsely glandular puberulent distally. |
Stems | ascending to erect, unbranched or well-branched at base and distally, 15–100 cm. |
sometimes with lateral branches arisingobliquely from rosette, 30–80 cm. |
Leaves | in a basal rosette and cauline, basal 3–15 × 0.5–1 cm, blade lyrate; cauline 1–9 × 0.1–0.8 cm, blade linear to very narrowly elliptic or narrowly lanceolate, margins sinuate-dentate to subentire. |
in a basal rosette and cauline, basal 7–17 × 0.5–1.5 cm, cauline 2–8 × 0.5–1.5 cm; blade narrowly oblanceolate, gradually narrowly elliptic to narrowly oblong distally, margins lobed to remotely dentate or subentire; bracts slightly longer than capsule they subtend. |
Inflorescences | open, lax, without lateral branches, mature buds usually not overtopping spike apex. |
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Flowers | 4-merous, zygomorphic, opening at sunset; floral tube 6–10 mm; sepals 6–12 mm; petals white, fading pink to red, narrowly obovate, 5.5–9.5 mm, short-clawed; filaments 4–6 mm, anthers 2–3 mm, pollen 90–100% fertile; style 11–19 mm, stigma surrounded by anthers at anthesis. |
1 or 2 per spike opening per day near sunset; buds erect, with free tips erect to spreading, 0.3–0.8 mm; floral tube slightly curved upward to straight, 23–37 mm; sepals 7–13 mm; petals yellow, broadly elliptic to rhombic-ovate, 8–17 mm; filaments 6–10 mm, anthers 1.5–4 mm, pollen ca. 50% fertile; style 30–45 mm, stigma surrounded by anthers at anthesis. |
Capsules | ellipsoid or narrowly obovoid, narrowly 4-winged, furrowed between wings, 6–8 × 2–3 mm, narrowed at base, stipe 0 mm; sessile. |
narrowly lanceoloid, 10–25 ×2–3 mm. |
Seeds | 4, yellowish to reddish brown, 2–3 × 1–1.5 mm. |
brown, sometimes flecked with darkred spots, ellipsoid, 1–1.3 × 0.5–0.7 mm. |
2n | = 14. |
= 14. |
Oenothera podocarpa |
Oenothera curtissii |
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Phenology | Flowering (May–)Jun–Oct. | Flowering Jun–Sep. |
Habitat | Disturbed sites, sandy washes, slopes, grasslands, meadows, pinyon-juniper or ponderosa pine woodlands, on volcanic cinders. | Dry places, pine-oak woods, fields, roadsides, sandy soil. |
Elevation | 700–2800 m. (2300–9200 ft.) | 0–60 m. (0–200 ft.) |
Distribution |
AZ; NM; Mexico (Chihuahua, Durango, Sonora) |
AL; FL; GA; SC |
Discussion | Oenothera podocarpa occurs in Arizona from eastern Mohave County south through the mountains of central Arizona to eastern Pima County and the southwestern quarter of New Mexico, and in Mexico southward in the Sierra Madre Occidental to eastern Sonora and throughout the western halves of Chihuahua and Durango. P. H. Raven and D. P. Gregory (1972[1973]) determined O. podocarpa to be self-compatible and primarily autogamous. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera curtissii is a PTH species and forms a ring of 14 chromosomes in meiosis, and is self-compatible and autogamous (W. Dietrich and W. L. Wagner 1988). It is known only from northern Florida, adjacent southern Georgia and southeastern Alabama, and one disjunct locality in South Carolina (Allendale County). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 10. | FNA vol. 10. |
Parent taxa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Gaura > subsect. Gaura | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Candela |
Sibling taxa | ||
Synonyms | Gaura podocarpa, G. brassicacea, G. glandulosa, G. gracilis, G. hexandra subsp. gracilis, G. strigillosa, O. hexandra subsp. gracilis | O. heterophylla var. curtissii |
Name authority | (Wooton & Standley) Krakos & W. L. Wagner: PhytoKeys 28: 68. (2013) | Small: Fl. S.E. U.S. ed. 2, 1353. (1913) |
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