Oenothera stricta |
Oenothera coronopifolia |
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Chilean evening primrose |
crownleaf evening primrose |
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Habit | Herbs perennial, strigillose, usually also hirsute; from a taproot, lateral roots producing adventitious shoots. | |
Stems | ascending to erect, 1–several from base, these unbranched to well-branched, 10–60 cm. |
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Leaves | in a weakly developed basal rosette and cauline, 2–7 × 0.2–1.5 cm, axillary fascicles of reduced leaves often present; blade oblanceolate to oblong, margins usually pinnatifid, sometimes proximal ones coarsely few-toothed. |
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Flowers | 1–3 opening per day near sunset; buds nodding, weakly quadrangular, without free tips; floral tube 10–25 mm, mouth conspicuously pubescent, closed with straight, white hairs, 1–2 mm; sepals 10–20 mm; petals white, fading pink, ovate or shallowly obcordate, 10–15(–20) mm; filaments 10–15 mm, anthers 4–7 mm; style 17–42 mm, stigma exserted beyond anthers at anthesis. |
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Capsules | ascending to erect, straight, fusiform, weakly 4-angled, 10–20 × 3–5 mm, dehiscent 1/2 their length; sessile. |
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Seeds | in 2 rows per locule, ellipsoid to subglobose, 1.5–2 × 1.2–1.5 mm, surface regularly pitted, pits in longitudinal lines. |
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2n | = 14, 28. |
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Oenothera stricta |
Oenothera coronopifolia |
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Phenology | Flowering (Mar–)Jun–Aug(–Sep). | |
Habitat | Dry, open sites, grassy meadows, slopes, along drainages, foothills and mountains. | |
Elevation | 1500–3000 m. (4900–9800 ft.) | |
Distribution |
South America [Introduced, California] |
AZ; CO; ID; NE; NM; SD; UT; WY
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Discussion | Subspecies 2 (1 in the flora). Oenothera stricta is a PTH species and forms a ring of 14 chromosomes in meiosis, and is self-compatible and autogamous (W. Dietrich 1977). Subspecies stricta is naturalized in many areas around the world and may be so in California. Subspecies altissima W. Dietrich occurs only in Argentina. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera coronopifolia apparently has both self-incompatible and self-compatible populations (P. H. Raven 1979; W. L. Wagner et al. 2007; K. E. Theiss et al. 2010). (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. Munzia > ser. Allochroa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Kleinia |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Anogra coronopifolia | |
Name authority | Ledebour ex Link: Enum. Hort. Berol. Alt. 1: 377. (1821) — (as striata) | Torrey & A. Gray: Fl. N. Amer. 1: 495. (1840) |
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