Oenothera stricta |
Oenothera longissima |
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Chilean evening primrose |
long evening primrose, long-stem evening-primrose |
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Habit | Herbs biennial or short-lived perennial, sparsely strigillose, sometimes also villous and with pustulate hairs near inflorescence, sometimes also glandular puberulent. | |
Stems | erect, usually flushed with red proximally or sometimes green, unbranched or with branches obliquely arising from base, secondary branches arising from main stem, 60–300 cm. |
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Leaves | in a basal rosette and cauline, basal 9–40 × 1.4–5 cm, cauline 5–22 × 0.8–2.5 cm; blade dull green, flat, narrowly oblanceolate, oblanceolate to narrowly elliptic, or narrowly lanceolate, margins bluntly dentate or subentire, teeth widely spaced; bracts persistent. |
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Inflorescences | open, erect, unbranched. |
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Flowers | opening near sunset; buds erect, 5–9 mm diam., with free tips terminal, erect, 2–6 mm; floral tube deciduous after anthesis, 60–135 mm; sepals yellowish green, flushed with some red or red to dark red throughout, 25–55 mm; petals yellow to pale yellow, fading orange or pale yellow, very broadly obcordate, 28–65 mm; filaments 20–40 mm, anthers 14–20 mm, pollen 90–100% fertile; style 90–180 mm, stigma exserted beyond anthers at anthesis. |
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Capsules | erect or slightly spreading, dull green or gray-green when dry, narrowly lanceoloid, 25–55 × 4–9 mm, free tips of valves 1–2(–3) mm. |
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Seeds | 1–1.9 × 0.6–1.2 mm. |
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2n | = 14. |
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Oenothera stricta |
Oenothera longissima |
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Phenology | Flowering Jul–Sep(–Oct). | |
Habitat | Seasonally moist sites, sandy or sandy-loam soil, sites with high alkalinity or associated with limestone, along desert washes, streams, seeps, roadsides. | |
Elevation | 800–2800 m. (2600–9200 ft.) | |
Distribution |
South America [Introduced, California] |
AZ; CA; CO; NM; NV; UT
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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 longissima has plastome I and a AA genome composition. Oenothera longissima is known from northern and western Arizona, Inyo, Los Angeles, and San Bernardino counties in California, Delta and Montezuma counties in Colorado, eastern Nevada, San Juan County in New Mexico, and southern Utah. (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. Oenothera > subsect. Oenothera |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | O. clutei, O. longissima subsp. clutei, O. longissima var. clutei | |
Name authority | Ledebour ex Link: Enum. Hort. Berol. Alt. 1: 377. (1821) — (as striata) | Rydberg: Bull. Torrey Bot. Club 40: 65. (1913) |
Web links |