Oenothera deltoides |
Oenothera cordata |
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basket evening-primrose, birdcage evening primrose, desert lantern, devil's lantern, dune primrose, hairy evening primrose, lion-in-a-cage |
heartleaf evening primrose |
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Habit | Herbs usually winter-annual, sometimes perennial, glabrous, glandular puberulent, strigillose, and/or villous, sometimes more villous distally, hairs sometimes very curly, especially on flower parts; from a taproot or relatively long, fleshy roots. | Herbs annual or biennial, densely to sparsely strigillose, glandular puberulent or sometimes also sparsely villous distally. | ||||||||||||||||
Stems | central stem usually erect, usually thickened at base and spongy, branched or unbranched, branches few–several, slender, decumbent to ascending, from base, usually encircling central stem in older plants, 10–40(–100) cm. |
unbranched or branched primarily distally, 25–70 cm. |
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Leaves | in a basal rosette and cauline, rosette usually well developed (except subsp. howellii), basal 5–25 × 1–5 cm, cauline 4–12(–18) × 0.5–4 cm; petiole 1.5–8 cm; blade rhombic-obovate, lanceolate, or oblanceolate, margins subentire, dentate, or pinnatifid. |
in a basal rosette and cauline, basal 6–12 × 0.7–2 cm, cauline 2–10 ×0.5–3 cm; subsessile; blade narrowly elliptic to oblanceolate, gradually narrowly lanceolate to lanceolate, elliptic, or ovate distally, margins lobed to remotely dentate or subentire; bracts shorter than capsule they subtend, 0.5–1.7 cm. |
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Inflorescences | open, lax, usually unbranched, mature buds usually overtopping spike apex. |
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Flowers | 1–several opening per day near sunset; buds nodding, weakly or strongly quadrangular or fluted in distal 1/2, with free tips 0–9 mm; floral tube 20–40 mm; sepals (13–)15–35 mm, not spotted; petals white, fading pink to deep pink, broadly obovate or obcordate, 15–44 mm; filaments 8–15 mm, anthers 5–14 mm; style 35–60 mm, stigma exserted beyond anthers at anthesis. |
1–few per spike opening per day near sunset; buds erect, with free tips erect, 1–3 mm; floral tube nearly straight, 20–40 mm; sepals 15–25 mm; petals yellow, broadly elliptic to rhombic-ovate, 20–30 mm; filaments 17–22 mm, anthers 4–7 mm, pollen 85–100% fertile; style 50–65 mm, stigma usually exserted beyond anthers at anthesis. |
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Capsules | spreading, straight to curved, becoming somewhat woody in age, cylindrical to slightly 4-angled, widest toward base, tapering from base to apex, (15–)30–80 × 1.5–5 mm; sessile. |
narrowly lanceoloid, 15–33 × 2–3 mm. |
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Seeds | numerous, in 1 row per locule, buff with dark spots or black, narrowly obovoid, 1.5–2.8 mm. |
dark brown, ellipsoid, 1–1.4 ×0.4–0.6 mm. |
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2n | = 14. |
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Oenothera deltoides |
Oenothera cordata |
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Phenology | Flowering Apr–Jul. | |||||||||||||||||
Habitat | Sandy, open places in oak woodlands. | |||||||||||||||||
Elevation | 30–200 m. (100–700 ft.) | |||||||||||||||||
Distribution |
w United States; nw Mexico
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TX |
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Discussion | Subspecies 5 (5 in the flora). Oenothera deltoides is self-incompatible or self-compatible (W. M. Klein 1964; W. L. Wagner et al. 2007; K. E. Theiss et al. 2010). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera cordata is self-incompatible. It occurs in a narrow range in eastern Texas (Austin, Bastrop, Colorado, Fayette, Guadalupe, Goliad, Matagorda, San Patricio, Victoria, Waller, and Wilson). It apparently occasionally hybridizes with O. heterophylla subsp. heterophylla where their ranges come together. Oenothera bifrons D. Don 1838 (not Lindley 1831) pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 10. | FNA vol. 10. | ||||||||||||||||
Parent taxa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Anogra | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Candela | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | Anogra deltoides | |||||||||||||||||
Name authority | Torrey & Frémont in J. C. Frémont: Rep. Exped. Rocky Mts., 315. (1845) | J. W. Loudon: Ladies’ Flower-gard. Ornam. Perenn. 1: 167. (1843) | ||||||||||||||||
Web links |