Oenothera parviflora L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Onagraceae
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Scientific Name
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Description
Species Description - Resembling no. 3 and often mistaken for it; infl-tips nodding; hypanthium 1.5–4 cm; sep 1–2 cm, the free tips 1–3 mm, subterminal, the actual end of the sep represented by a distinct transverse ridge or a small lobe; pet 1–2 cm; anthers 4–7 mm; style 0.5–2.5 cm; fr 1.5–4 cm, only slightly tapering; seeds 1.8–2.2 mm; 2n=14, a complex heterozygote. Disturbed open places, abundant especially northward; Nf. to Va. and W.Va., w. to Minn. and Ark. July–Oct. Highly variable. Closely and minutely canescent-strigulose plants, without gland-tipped hairs, occur mainly from Mass. to Va. and have been called var. oakesiana (Robbins) Fernald (O. oakesiana), in contrast to var. parviflora, widespread but more common northward, with intermingled long and short hairs, often some of them gland-tipped, varying to nearly glabrous. (O. angustissima; O. cruciata)
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Common Names
small-flowered evening-primrose