Common Name: EVENING-PRIMROSE FAMILY Habit: Annual to perennial herb (to tree). Leaf: cauline or basal, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous. Inflorescence: spike, raceme, panicle, or flowers 1 in axils; bracted. Flower: generally bisexual, generally radial, often opening at either dawn or dusk; hypanthium generally prolonged beyond ovary (measured from ovary tip to sepal base); sepals 4(2--7); petals 4(2--7, rarely 0), often fading darker; stamens 2 × or = sepals in number, anthers 2-chambered, opening lengthwise, pollen interconnected by threads; ovary inferior, chambers generally as many as sepals (sometimes becoming 1), placentas axile or parietal, ovules 1--many per chamber, style 1, stigma 4-lobed (or lobes as many as sepals), club-shaped, spheric, or hemispheric. Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like). Seed: sometimes winged or hair-tufted. Genera In Family: 22 genera, +- 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). Note:Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California. eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera, treatment of genera by Warren L. Wagner, except as noted Scientific Editor: Robert W. Patterson, Bruce G. Baldwin.
Common Name: EVENING-PRIMROSE Habit: Annual to perennial herb, generally from taproot, occasionally rhizomed. Leaf: basal or cauline, alternate, generally pinnately toothed to lobed, generally sessile. Inflorescence: spike, raceme-like, or flowers in axils of distal, reduced leaves. Flower: radial or (sect. Gaura) bilateral, generally opening at dusk; sepals 4, reflexed in flower (sometimes 2--3 remaining adherent); petals 4, yellow, white, rose, or +- purple, generally fading +- orange to +- purple, tip notched or toothed; stamens 8, filaments sometimes (sect. Gaura) with paired teeth at base, anthers attached at middle; ovary chambers 4, stigma generally deeply lobed, generally > anthers and cross-pollinated (or +- = anthers and self-pollinated). Fruit: generally dehiscent, cylindric to ovoid or obovoid, cylindric to 4-winged or -angled, straight to curved, generally sessile (base sometimes seedless, stalk-like). Seed: in generally 2(1--3) rows per chamber, or clustered or reduced to 1--4 per fruit. Etymology: (Greek: wine-scented) Unabridged Note: Many species self-pollinated; some of these have chromosome peculiarities (ring of 14 in meiosis) and +- 50% pollen fertility; they yield genetically identical offspring. eFlora Treatment Author: Warren L. Wagner Reference: Wagner et al. 2007 Syst Bot Monogr 83:1--240 Unabridged Reference: Raven & Gregory 1972 Mem Torrey Bot Club 23:1--96; Dietrich & Wagner 1988 Syst Bot Monogr 24:1--91; Wagner 2005 Syst Bot 30(2):332--355
Oenothera sinuosa W.L. Wagner & Hoch
NATURALIZED Habit: Perennial herb, forming large mats, rhizomed; hairs generally sparse or 0. Stem: 20--60 cm, branched, sparsely minutely strigose and with long, spreading hairs. Leaf: 10--110 mm, linear to narrow-oblanceolate, slightly wavy-dentate. Inflorescence: bracts 1--5 mm. Flower: hypanthium 2.5--5 mm; sepals 7--14 mm; petals 7--14.5 mm. Fruit: erect, 4--16 mm, +- linear, narrowly 4-winged; stalk-like base 2--8 mm, slender, tapered. Seed: 1--4, 2--3 mm. Chromosomes: 2n=28. Ecology: Light sandy loam of cultivation fields; Elevation: < 1000 m. Bioregional Distribution: GV, CW, SW, DMoj; Distribution Outside California: native to Oklahoma, Texas; widely naturalized, especially southeastern United States. Flowering Time: Jun--Sep Note: Limited by self-sterility. Synonyms: Gaura sinuata Nutt. ex Ser.; Gaura villosa Torr. var. villosa, misappl.; Gaura villosa var. mckelveyae Munz, misappl. Jepson eFlora Author: Warren L. Wagner Reference: Wagner et al. 2007 Syst Bot Monogr 83:1--240 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Noxious Weed listed on the CDFA Weed Pest Ratings table View the CDFA Pest Rating page for Oenothera sinuosa Weed listed by Cal-IPC Previous taxon: Oenothera rosea Next taxon: Oenothera speciosa
Botanical illustration including Oenothera sinuosa
Citation for this treatment: Warren L. Wagner 2017, Oenothera sinuosa, in Jepson Flora Project (eds.) Jepson eFlora, Revision 5, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=89230, accessed on March 19, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on March 19, 2024.
No expert verified images found for Oenothera sinuosa.
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