Oenothera glaucifolia |
Oenothera filipes |
|
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false gaura |
slenderstalk beeblossom |
|
Habit | Herbs probably biennial, glabrous, becoming sparsely to densely glandular puberulent and short-villous distally, glaucous at least in proximal parts; from stout roots. | Herbs perennial, clumped, sparsely to densely strigillose, inflorescence usually glabrous or glandular puberulent, sometimes proximalmost parts villous, hairs erect, 1–2 mm; from heavy, twisted, woody rootstock. |
Stems | erect, branched or unbranched, 30–300 cm. |
erect, branched below and just above ground, branched also proximal to inflorescences, 60–250(–300) cm. |
Leaves | in a basal rosette and cauline, basal 3–7 × 0.5–2 cm, sessile, blade oblong to oblong-lanceolate, base usually ± auriculate, margins entire; cauline 3–8(–10) × 0.4–1.8 cm, blade lanceolate to oblong-lanceolate, gradually smaller, becoming linear-subulate distally. |
in a basal rosette and cauline, (1–)3–9 × (0.1–)0.5–1.3 cm, blade linear or narrowly lanceolate to narrowly oblanceolate, margins slightly to coarsely sinuate-dentate. |
Inflorescences | long, wandlike, unbranched or branched. |
slender, often well-branched, buds small and well-spaced. |
Flowers | 4-merous, nearly actinomorphic, opening near sunrise; floral tube 6–17 mm; sepals 4–6 mm; petals white, fading off-white or tinged pink, slightly unequal, rhombic, 4–6 mm, abruptly clawed; filaments 5–8 mm, anthers 1.5–2 mm, pollen 85–100% fertile; style 6–10, stigma exserted beyond anthers at anthesis. |
4-merous, zygomorphic, opening near sunset; floral tube 2.5–6 mm; sepals 5–12.5 mm; petals white, fading pink to red, slightly unequal, elliptic, 5–10 mm, clawed; stamens presented evenly around flower parts, filaments 3–8.5 mm, anthers 1.4–4 mm, pollen 90–100% fertile; style 8.5–19 mm, stigma exserted beyond anthers at anthesis. |
Capsules | ovoid, 4-angled, somewhat flattened, 3–4 × 1.5–2.3 mm, valves with raised midrib and conspicuous lateral veins; sessile. |
ovoid, narrowly 4-winged or 4-angled, 5–10 × 1.5–2 mm, abruptly constricted to a sterile stipe 0.5–4.5 mm. |
Seeds | 1, pale yellow, oblanceoloid, 2.4–2.6 × 1–1.5 mm. |
1 or 2, yellowish to reddish brown, 1.5–3.5 × 1–1.5 mm. |
2n | = 14. |
= 14. |
Oenothera glaucifolia |
Oenothera filipes |
|
Phenology | Flowering May–Oct(–Nov). | Flowering May–Sep(–Oct). |
Habitat | Rocky prairie slopes and outcrops or bluffs, along streams, roadsides, usuallyon limestone. | Sandy hills and flats, open woods. |
Elevation | 200–1300 m. (700–4300 ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
AR; CO; KS; MO; NE; NM; OK; TX; WY
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AL; FL; GA; IL; IN; KY; LA; MO; MS; SC; TN
|
Discussion | Oenothera glaucifolia is self-incompatible, the flowers diurnal, pollinated primarily by wasps (R. Clinebell, unpubl.), as well as bees, flies, butterflies, and occasionally beetles (summarized by W. L. Wagner et al. 2007). It was collected once in 1988 in Indiana at Miller Woods Visitor Center (Lake County), Dritz 596 (MOR); it seems likely that it was introduced, and has not been collected there since. Stenosiphon virgatus Spach is a superfluous name and pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera filipes occurs marginally in several states, including: southernmost Illinois and southern Indiana; northern Florida; southeastern Mississippi; and, Washington Parish, Louisiana. P. H. Raven and D. P. Gregory (1972[1973]) determined O. filipes 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. Gaura > subsect. Stenosiphon | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Gaura > subsect. Stipogaura |
Sibling taxa | ||
Synonyms | Gaura linifolia, Stenosiphon linifolius | Gaura filipes, G. filipes var. major, G. michauxii |
Name authority | W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 212. (2007) | (Spach) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 212. (2007) |
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