Oenothera laciniata |
Oenothera coryi |
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cut-leaf evening-primrose, southern evening primrose |
El Paso evening primrose |
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Habit | Herbs annual, sparsely to moderately strigillose, sometimes also villous, sometimes also becoming glandular puberulent distally. | Herbs acaulescent or caulescent, densely strigillose and glandular puberulent distally; from a taproot. |
Stems | erect to ascending, unbranched to much branched, 5–50 cm. |
densely leafy, 4–20 cm. |
Leaves | in a basal rosette and cauline, basal 4–15 × 1–3 cm, cauline 2–10 × 0.5–3.5 cm; blade green, narrowly oblanceolate to narrowly elliptic or narrowly oblong, margins usually dentate or deeply lobed; bracts spreading, flat. |
in a basal rosette, sometimes also cauline, 5–16 × (0.2–)0.3–0.5(–0.7) cm; petiole 0.6–3.5 cm; blade linear to narrowly lanceolate, margins entire or sometimes proximal 1/2 of blade remotely lobed, apex long-attenuate, acute to rounded. |
Flowers | usually 1 opening per day near sunset; buds erect, with free tips erect, 0.3–3 mm; floral tube 12–35 mm; sepals 5–15 mm; petals yellow, fading orange or reddish tinged, broadly obovate or obcordate, 5–22 mm; filaments 3–14 mm, anthers 4–5 mm, pollen ca. 50% fertile; style 20–50 mm, stigma surrounded by anthers at anthesis. |
usually 1–3, rarely more, opening per day near sunset, weakly scented; buds with unequal free tips 0.7–1.2 mm; floral tube (55–)75–100(–125) mm; sepals 34–40 mm; petals lemon-yellow, fading orange, drying lavender to purple, broadly obovate, 35–43 mm, sometimes with terminal tooth; filaments 17–25 mm, anthers 14–17 mm; style (85–)105–135(–143) mm, stigma exserted beyond anthers at anthesis. |
Capsules | cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm. |
leathery, lanceoloid to ovoid, winged, wings 4–6 mm wide, body 25–30 × 8 mm, dehiscent 1/4–1/3 their length; pedicel 1–2(–3) mm. |
Seeds | ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm. |
numerous, usually in 2 distinct rows per locule, often reduced to 1 row near apex, rarely 1 row throughout, obovoid to subcuboid, 2.5–4 × 2.5–3.5 mm. |
2n | = 14. |
= 42. |
Oenothera laciniata |
Oenothera coryi |
|
Phenology | Flowering (Feb–)Apr–Sep(–Oct). | Flowering Apr–May. |
Habitat | introduced nearly worldwide in temperate and subtropical areas.. | Open grasslands, disturbed areas. |
Elevation | 0–1000(–1300) m. (0–3300(–4300) ft.) | 300–1000 m. (1000–3300 ft.) |
Distribution |
AL; AR; CA; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; WY [Introduced nearly worldwide in temperate and subtropical areas]
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TX |
Discussion | Oenothera laciniata is a PTH species and forms aring of 14 chromosomes in meiosis, and is self-compatible and autogamous (W. Dietrich and W. L. Wagner 1988). Oenothera laciniata is known in New Mexico from Doña Ana and Roosevelt counties from non-montane habitats and thus do not appear to represent O. pubescens; however, a few collections from Brewster and Jeff Davis counties, Texas, reported by W. Dietrich and W. L. Wagner (1988) as O. laciniata appear to represent collections of O. pubescens. Dietrich and Wagner found that O. laciniata hybridizes not only with O. grandis, but also with O. drummondii subsp. drummondii, O. humifusa, and O. mexicana. It is naturalized nearly worldwide in temperate and subtropical areas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera coryi is known only from Baylor, Callahan, Knox, Nolan, Taylor, and Throckmorton counties in north-central Texas and Crosby and Garza counties in the Texas Panhandle. (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. Oenothera > subsect. Raimannia | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Megapterium |
Sibling taxa | ||
Synonyms | O. minima, O. repanda, O. sinuata, O. sinuata var. minima, Onagra sinuata, Raimannia laciniata | |
Name authority | Hill: Veg. Syst. 12(app.): 64, plate 10. (1767) | W. L. Wagner: Ann. Missouri Bot. Gard. 73: 475. (1986) |
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