Oenothera curtiflora |
Oenothera falfurriae |
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lizard-tail, small-flower bee-blossom, small-flower gaura, velvet weed |
royal evening primrose |
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Habit | Herbs annual, strigillose, glandular puberulent, and long-villous; from heavy taproot, 2–4 cm diam. | Herbs annual, moderately to sparsely strigillose and villous, sometimes glandular puberulent distally. |
Stems | erect, unbranched or many-branched distally, (20–)30–200(–300) cm. |
erect to ascending, usually unbranched, 10–40 cm. |
Leaves | in a basal rosette and cauline, basal 4–15 × 1.5–3 cm, petiole 0–1.8 cm, blade broadly oblanceolate, margins sinuate-dentate to dentate; cauline 2–13 × 0.5–5 cm, petiole 0–2 cm, blade narrowly elliptic to narrowly ovate, margins sinuate-dentate to dentate. |
in a basal rosette and cauline, basal 5–12 ×1.3–3.5 cm, cauline 2–8.5 ×1–3 cm; blade green, narrowly oblanceolate to narrowly elliptic or narrowly lanceolate, margins usually dentate to pinnatifid, sometimes subentire; bracts spreading, flat. |
Inflorescences | relatively long, dense. |
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Flowers | 4-merous, nearly actinomorphic, opening near sunset; floral tube 1.5–5 mm; sepals 2–3.5 mm; petals white, fading pale to dark pink, slightly unequal, oblong-obovate to elliptic-oblanceolate, 1.5–3 mm, abruptly clawed; filaments 1.5–3 mm, anthers 0.5–1 mm, pollen 85–100% fertile; style 3–9 mm, stigma surrounded by anthers at anthesis. |
usually 1 opening per day near sunset; buds erect, with free tips erect, 0.5–2 mm; floral tube 25–40 mm; sepals 10–22 mm; petals yellow, fading orange or reddish tinged, broadly obovate or shallowly obcordate, 13–25 mm; filaments 10–17 mm, anthers 4–5 mm, pollen 85–100% fertile; style 35–50 mm, stigma slightly exserted beyond anthers at anthesis. |
Capsules | fusiform, terete, weakly angled in distal 1/3, angles becoming broad and rounded in proximal part, 5–11 × 1.5–3 mm, tapering abruptly toward base; sessile. |
cylindrical, sometimes slightly enlarged toward apex, 20–45 × 2–2.5 mm. |
Seeds | 3 or 4, reddish brown, 2–3 × 1–1.5 mm. |
ellipsoid, 0.8–1.4 × 0.3–0.6 mm. |
2n | = 14. |
= 14. |
Oenothera curtiflora |
Oenothera falfurriae |
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Phenology | Flowering (Feb–)Apr–Oct. | Flowering Apr–Aug. |
Habitat | Rocky prairie slopes, woodlands, along streams, roadsides, disturbed areas. | Open, sandy sites. |
Elevation | 10–2800 m. (0–9200 ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
AL; AR; AZ; CA; CO; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; MN; MO; MT; NE; NM; NV; OK; OR; SC; SD; TN; TX; UT; VA; WA; WY; Mexico (Baja California, Chihuahua, Coahuila, Durango, Nuevo León, Sinaloa, Zacatecas) [Introduced in South America (Argentina), Asia (China, Japan), Australia]
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TX |
Discussion | Oenothera curtiflora is self-compatible and autogamous (P. H. Raven and D. P. Gregory 1972[1973]). Sometimes it is apparently a biennial. The species is native to grassland regions and open areas across much of interior North America. The full extent of its indigenous range is not clear and collections from the eastern half of the United States (Alabama, Florida, Georgia, Indiana, Massachusetts, and Tennessee) and California may be more recent introductions. Gaura mollis Nuttall ex Torrey 1827 is an isonym of G. mollis E. James 1822, a suppressed name. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera falfurriae is known only from southeastern Texas (Aransas, Brazos, Brooks, Cameron, Frio, Harris, Hidalgo, Jim Hogg, Jim Wells, Kenedy, Kleberg, Maverick, Nueces, Refugio, Starr, Val Verde, Victoria, Webb, Willacy, Wilson, and Zapata counties). It is self-compatible and autogamous, but not a PTH species. (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. Schizocarya | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Raimannia |
Sibling taxa | ||
Synonyms | Gaura parviflora, G. australis, G. hirsuta, G. micrantha, G. parviflora var. lachnocarpa, Schizocarya micrantha | |
Name authority | W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 211. (2007) | W. Dietrich & W. L. Wagner: Ann. Missouri Bot. Gard. 74: 149. (1987) |
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