Oenothera laciniata |
Oenothera calcicola |
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cut-leaf evening-primrose, southern evening primrose |
Texas beeblossom |
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Habit | Herbs annual, sparsely to moderately strigillose, sometimes also villous, sometimes also becoming glandular puberulent distally. | Herbs perennial, clumped, usually sparsely strigillose, rarely glabrate or sparsely villous, hairs erect, sometimes sparsely glandular puberulent distally; from twisted, woody rootstock. |
Stems | erect to ascending, unbranched to much branched, 5–50 cm. |
erect, branched below and just above ground, branched also proximal to inflorescences, (40–)60–250 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 and cauline, basal 3–13 × 0.6–2.5 cm, blade spatulate to oblanceolate, cauline (1–)2.5–12 × 0.1–1 cm, blade linear to narrowly oblanceolate, margins slightly to conspicuously sinuate-dentate. |
Inflorescences | slender. |
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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. |
4-merous, zygomorphic, opening near sunset; floral tube 3–9 mm; sepals 6–12 mm; petals white, fading dark pink to red, slightly unequal, elliptic-obovate, 7–11 mm; stamens presented in lower 1/2 of flower, filaments 3–7 mm, anthers 2.5–5 mm, pollen 90–100% fertile; style 9.5–19 mm, stigma exserted beyond anthers at anthesis. |
Capsules | cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm. |
lanceoloid to narrowly ovoid, narrowly 4-winged, 7–12 × 1.5–2.5 mm, tapered to a sterile stipe 2–5 mm. |
Seeds | ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm. |
(2 or)3 or 4(or 5), light brown or reddish brown, 1.5–2.5 × 0.8–1.3 mm. |
2n | = 14. |
= 14. |
Oenothera laciniata |
Oenothera calcicola |
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Phenology | Flowering (Feb–)Apr–Sep(–Oct). | Flowering Apr–May. |
Habitat | introduced nearly worldwide in temperate and subtropical areas.. | Dry limestone, gypsum, or caliche soil, slopes. |
Elevation | 0–1000(–1300) m. (0–3300(–4300) ft.) | 400–1800(–2100) m. (1300–5900(–6900) 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; Mexico (Coahuila, Durango, Nuevo León, Tamaulipas) |
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 calcicola occurs at mostly higher elevations and more montane areas than other species of subsect. Stipogaura, from the southern Trans-Pecos and Edwards Plateau regions of Texas southward into northern Mexico. P. H. Raven and D. P. Gregory (1972[1973]) determined O. calcicola to be self-incompatible. It is known to form hybrids with O. suffrutescens. (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. Gaura > subsect. Stipogaura |
Sibling taxa | ||
Synonyms | O. minima, O. repanda, O. sinuata, O. sinuata var. minima, Onagra sinuata, Raimannia laciniata | Gaura calcicola |
Name authority | Hill: Veg. Syst. 12(app.): 64, plate 10. (1767) | (P. H. Raven & D. P. Gregory) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 211. (2007) |
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