Oenothera simulans |
Oenothera jamesii |
|
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southern beeblossom |
trumpet evening primrose |
|
Habit | Herbs annual, glabrate, strigillose, and/or hirtellous; from taproot. | Herbs biennial or winter-annual, usually predominately and densely strigillose, sometimes also villous with scattered, appressed hairs, rarely with a few pustulate hairs, inflorescence sometimes also glandular puberulent. |
Stems | usually unbranched, sometimes several-branched from base, 60–180 cm. |
erect, usually green, rarely flushed with red, unbranched or with branches arising obliquely from rosette and secondary branches arising from main stem, 60–180 cm. |
Leaves | in a basal rosette and cauline, 0.8–13 × 0.1–1.6 cm; blade often red-blotched, narrowly lanceolate to narrowly oblanceolate, margins slightly to conspicuously sinuate-dentate. |
in a basal rosette and cauline, basal 10–30 × 2.5–5 cm, cauline 4–20 × 1–5 cm; blade dull green, flat, narrowly oblanceolate, oblanceolate to narrowly elliptic, or narrowly lanceolate, margins bluntly dentate or subentire, teeth widely spaced; bracts persistent. |
Inflorescences | erect, usually unbranched, rarely with few lateral branches. |
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Flowers | 3 or 4-merous, often mixed on a single plant, zygomorphic, opening near sunset; floral tube 3–8 mm; sepals 2.5–8 mm; petals white, fading pink, narrowly elliptic-obovate, 4.5–8 mm; filaments 2.5–6 mm, anthers 0.5–2 mm, pollen 90–100% fertile; style 7.5–19 mm, stigma surrounded by or slightly exserted beyond anthers. |
opening near sunset; buds erect, 7–12 mm diam., with free tips terminal, erect, 0.5–3 mm; floral tube persistent on ovary after anthesis, (60–)80–120(–160) mm; sepals yellowish green, red-striped to red throughout, 30–55 mm; petals yellow, fading orange or pale yellow, very broadly obcordate, 40–50 mm; filaments 23–30 mm, anthers 12–22 mm, pollen 90–100% fertile; style 90–170(–200) mm, stigma exserted beyond anthers at anthesis. |
Capsules | ellipsoid or ovoid, 3-(or 4-)angled, 5–9 × 2–3 mm; sessile. |
erect or slightly spreading, dull green or gray-green when dry, narrowly lanceoloid, 20–50 × 6–12 mm, free tips of valves 2.5–5 mm. |
Seeds | 2–4, yellowish to light brown, 1.2–2.3 × 0.8–1.1 mm. |
1–1.2 × 0.7–1.3 mm. |
2n | = 14. |
= 14. |
Oenothera simulans |
Oenothera jamesii |
|
Phenology | Flowering (Feb–)May–Sep(–Nov). | Flowering Jul–Sep(–Oct). |
Habitat | Sandy soil in open woodlands, fields, roadsides, primarily in outer Coastal Plain. | Sandy stream banks, ditches, moist areas, cultivated areas, disturbed roadsides. |
Elevation | 0–10 m. (0–0 ft.) | (30–)300–1800 m. ((100–)1000–5900 ft.) |
Distribution |
FL; GA; NC; SC
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KS; OK; TX; Mexico (Coahuila, Nuevo León, Puebla) [Introduced in e Asia (Japan), s Africa, Atlantic Islands (Canary Islands)] |
Discussion | Oenothera simulans occurs along the Coastal Plain from Cape Hatteras, North Carolina, southward and throughout Florida. It is self-compatible and autogamous (P. H. Raven and D. P. Gregory 1972[1973]). The species occasionally persists through mild winters in the southern part of its range, appearing biennial. Gaura fruticosa Jacquin 1786, not G. fruticosa Loefling 1758, is an illegitimate later homonym that pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera jamesii has plastome I and a AA genome composition; it is known in the flora area from southern Kansas (Clark County), central Oklahoma, and Texas. (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. Gaura | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Oenothera |
Sibling taxa | ||
Synonyms | Gaura simulans, G. angustifolia, G. angustifolia var. eatonii, G. angustifolia var. simulans, G. angustifolia var. strigosa, G. eatonii | Onagra jamesii, O. communis var. jamesii |
Name authority | (Small) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 213. (2007) | Torrey & A. Gray: Fl. N. Amer. 1: 493. (1840) |
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