Oenothera grandis |
Oenothera falfurriae |
|
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largeflower eveningprimrose, showy evening-primrose |
royal evening primrose |
|
Habit | Herbs annual, strigillose and sparsely villous, also glandular puberulent distally. | Herbs annual, moderately to sparsely strigillose and villous, sometimes glandular puberulent distally. |
Stems | erect to ascending, often with ascending lateral branches, 15–60(–100) cm. |
erect to ascending, usually unbranched, 10–40 cm. |
Leaves | in a basal rosette and cauline, basal 5–13 × 1–3 cm, cauline 3–10 × 1.5–3.5 cm; blade green, narrowly oblanceolate to narrowly elliptic, margins lobed or dentate, lobes often dentate; bracts spreading, flat. |
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. |
Flowers | 1–few opening per day near sunset; buds erect, with free tips terminal, erect or hornlike, 1.5–5 mm; floral tube 25–45 mm; sepals 15–30 mm; petals yellow, very broadly obovate or shallowly obcordate, 25–40 mm; filaments 12–22 mm, anthers 4–11 mm, pollen 85–100% fertile; style 40–75 mm, stigma exserted beyond 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 | cylindrical, sometimes slightly enlarged toward apex, 25–50 ×2–3 mm. |
cylindrical, sometimes slightly enlarged toward apex, 20–45 × 2–2.5 mm. |
Seeds | broadly ellipsoid to subglobose, 0.8–1.5 × 0.5–0.9 mm. |
ellipsoid, 0.8–1.4 × 0.3–0.6 mm. |
2n | = 14. |
= 14. |
Oenothera grandis |
Oenothera falfurriae |
|
Phenology | Flowering Mar–Sep. | Flowering Apr–Aug. |
Habitat | Open, sandy sites. | Open, sandy sites. |
Elevation | 0–1500(–2200) m. (0–4900(–7200) ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
AL; AR; CO; CT; FL; IL; IN; KS; LA; MD; MI; MO; NC; NE; NJ; NM; TX; Mexico (Tamaulipas)
|
TX |
Discussion | Oenothera grandis is probably native to eastern New Mexico and Colorado, Arkansas, Kansas, Louisiana, Missouri, Nebraska, Oklahoma, and Texas, and northeastern Tamaulipas, Mexico. Scattered collections made in other states probably represent introductions (W. Dietrich and W. L. Wagner 1988). Oenothera grandis is self-incompatible (W. Dietrich and W. L. Wagner 1988). Oenothera laciniata Hill var. occidentalis Small and O. laciniata var. grandis Britton are illegitimate superfluous names based on O. sinuata Linnaeus var. grandiflora S. Watson and pertain here. (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. Oenothera > subsect. Raimannia | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Raimannia |
Sibling taxa | ||
Synonyms | O. laciniata var. grandiflora, O. sinuata var. grandiflora, Raimannia grandis | |
Name authority | Smyth: Trans. Kansas Acad. Sci. 16: 160. (1899) | W. Dietrich & W. L. Wagner: Ann. Missouri Bot. Gard. 74: 149. (1987) |
Web links |