Oenothera kunthiana |
Oenothera demareei |
|
---|---|---|
Kunth's evening-primrose |
demaree's beeblossom |
|
Habit | Herbs annual, strigillose and also hirsute; from a slender taproot. | Herbs usually robust winter-annual, sometimes biennial, densely strigillose throughout; from fleshy taproot. |
Stems | 5–40 cm. |
usually well-branched distal to base, 50–400 cm. |
Leaves | 1–6 × 0.3–3 cm; petiole 0.1–1.1 cm; blade usually lanceolate to oblanceolate, sometimes elliptic, margins weakly serrate to sinuate-pinnatifid. |
in a basal rosette and cauline, 3–7 × 0.2–0.8 cm; blade narrowly elliptic to elliptic or lanceolate, margins subentire or shallowly undulate-denticulate. |
Flowers | 1–3 opening per day near sunset; buds with free tips 0–0.5 mm; floral tube 5–31 mm; sepals 10–27 mm; petals white, fading pink, 8–25 mm; filaments 6–12 mm, anthers 3–5 mm, pollen 35–65% fertile; style 12–30 mm, stigma surrounded by anthers at anthesis. |
4-merous, zygomorphic, opening at sunrise; floral tube 4–13(–15) mm; sepals 13–20 mm; petals white, fading pink, rhombic-obovate, 10–17 mm; filaments 8–17 mm, anthers 3–7 mm, pollen 90–100% fertile; style 18–32 mm, stigma exserted beyond anthers at anthesis. |
Capsules | broadly clavate or obovoid, 7–31 ×3–5 mm, winged, wings 0.5–1.5 mm, valve surface with prominent midrib, proximal stipe 3–17 mm; sessile. |
ellipsoid or ovoid, sharply 4-angled, 4.5–7 × 1.5–2.5 mm; sessile. |
Seeds | narrowly obovoid, 0.9–1.2 × 0.4–0.5 mm. |
2–4, yellowish to reddish brown, 1.2–3 × 0.7–1.3 mm. |
2n | = 14. |
= 14. |
Oenothera kunthiana |
Oenothera demareei |
|
Phenology | Flowering Feb–May. | Flowering Jul–Oct. |
Habitat | Alluvial flats, open areas, sandy soil, weedy sites. | Open meadows in sandy loam. |
Elevation | 10–1300[–2000] m. (0–4300[–6600] ft.) | 70–200 m. (200–700 ft.) |
Distribution |
TX; Mexico; Central America; n South America [Introduced widely in temperate Europe, Asia, Pacific Islands (Hawaii), Australia]
|
AR |
Discussion | Oenothera kunthiana is a PTH species and forms a ring of 14 chromosomes in meiosis, and is self-compatible and autogamous, common and widespread from sea level to middle elevations in the mountains from southern Texas south throughout Mexico except for Baja California and the tropical lowlands southward to Guatemala, Nicaragua, and Costa Rica; it was once collected in Minas Gerais, Brazil. Oenothera kunthiana was recently found to be naturalized in the Hawaiian Islands. Oenothera pinnatifida Kunth is a later homonym of O. pinnatifida Nuttall and another later homonym is O. micrantha Walpers, not Hornemann ex Sprengel (1825); they both pertain here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera demareei is known only from Clark, Garland, Hempstead, Howard, Montgomery, Pike, Saline, and Sevier counties. P. H. Raven and D. P. Gregory (1972[1973]) found Oenothera demareei to be self-incompatible. (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. Leucocoryne | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Gaura > subsect. Gaura |
Sibling taxa | ||
Synonyms | Hartmannia kunthiana, H. domingensis, H. parviflora, O. domingensis, O. fissifolia, O. walpersii | Gaura demareei |
Name authority | (Spach) Munz: Amer. J. Bot. 19: 759. (1932) | (P. H. Raven & D. P. Gregory) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 212. (2007) |
Web links |