Oenothera capillifolia |
Oenothera patriciae |
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plains beeblossom |
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Habit | Herbs perennial (short-lived or, sometimes, suffrutescent) or annual, glabrous or strigillose; from a stout taproot. | Herbs annual, villous proximally, sparsely villous along leaf veins and on margins, usually glabrate or, sometimes, strigillose distally; from taproot. | ||||
Stems | 1–many, weakly decumbent to ascending or erect, unbranched to moderately branched, (10–)25–80 cm. |
usually well-branched from base and distally, rarely unbranched, 15–65(–85) cm. |
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Leaves | 1–9 × (0.1–)0.3–1 cm, sometimes fascicles of small leaves to 2 cm present in non-flowering axils; petiole 0–0.6 cm; blade linear to narrowly lanceolate or oblanceolate, often folded lengthwise, usually not much reduced distally, proximalmost leaves sometimes spatulate, base attenuate, margins subentire or serrulate or spinulose-serrate, apex acute. |
in a basal rosette and cauline, basal 6–9.5 × 1–2 cm, blade lyrate; cauline 1–7 × 0.1–2.3 cm, blade narrowly lanceolate to oblanceolate, margins shallowly sinuate-denticulate to subentire. |
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Flowers | opening at sunrise; buds with free tips 0–4 mm; floral tube 5–20 mm; sepals 4–12 mm, midribs keeled; petals yellow, fading orangish to purplish, 6–25 mm; antisepalous filaments 2–8 mm, antipetalous filaments 1–4 mm, anthers 2–7 mm, pollen 90–100% fertile; style 9–30 mm, stigma sometimes blue-black, discoid to quadrangular, exserted beyond anthers. |
(3- or)4-merous, zygomorphic, opening at sunset; floral tube 6–12 mm; sepals 10–15 mm; petals white, fading pink to purple, elliptic-obovate, 8–13 mm; filaments 5–8 mm, anthers 2–4 mm, pollen 90–100% fertile; style 15–24 mm, stigma exserted beyond anthers at anthesis. |
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Capsules | 10–35 × 1–2 mm, hard, dehiscent 1/2 their length, often tardily dehiscent throughout their length. |
ellipsoid, narrowly (3- or)4-winged, deeply furrowed between wings, 6–10 × 2–3 mm, with or without prominent lower corners, narrowed to a stipe 0–1 mm; sessile. |
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Seeds | obovoid, 1–1.8 mm, sharply angled, apex truncate. |
3 or 4, yellowish to reddish brown, 2–3 × 1–1.5 mm. |
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2n | = 14. |
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Oenothera capillifolia |
Oenothera patriciae |
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Phenology | Flowering Feb–Jun. | |||||
Habitat | Open, sandy sites. | |||||
Elevation | 0–300 m. (0–1000 ft.) | |||||
Distribution | c United States; sc United States; n Mexico |
LA; MS; OK; TX |
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Discussion | Subspecies 2 (2 in the flora). Oenothera capillifolia is self-incompatible (H. F. Towner 1977). Oenothera berlandieri (Spach) Steudel 1841, not D. Dietrich 1840, is superfluous and cannot be used in Oenothera when transferred from Calylophus, and pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera patriciae is known from Acadia Parish, Louisiana, Amite County, Mississippi, Bryan and Love counties, Oklahoma, and eastern Texas. Reports of Oenothera patriciae near Tulsa, Oklahoma, and at the single locations in Arkansas and Mississippi may represent introductions. P. H. Raven and D. P. Gregory (1972[1973]) determined O. patriciae to be self-compatible, but primarily outcrossing. (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. Calylophus > subsect. Calylophus | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Gaura > subsect. Gaura | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Meriolix capillifolia | Gaura brachycarpa, G. hexandra var. coryi, G. tripetala var. coryi | ||||
Name authority | Scheele: Linnaea 21: 576. (1848) | W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 213. (2007) | ||||
Web links |