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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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.
22 genera, ± 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). [Wagner et al. 2007 Syst Bot Monogr 83:1–240] Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California. —Scientific Editors: Robert Patterson, Bruce G. Baldwin.
Unabridged references: [Munz 1965 North America Fl II 5:1–278]
Key to Onagraceae
Annual to subshrub or emergent aquatic, often floating, rooting at nodes. Leaf: alternate to opposite. Inflorescence: spike; flowers 1 per bract. Flower: radial; hypanthium 0; sepals 4–5(7), persistent; petals (0)4–5(7), white to yellow; stamens 4 or 10(12), pollen generally shed singly (in California); stigma club-shaped to spheric. Fruit: irregularly dehiscing; wall thick or thin. Seed: free or embedded in woody piece of fruit wall.Key to Ludwigia
82 species: ± worldwide. (C.G. Ludwig, German botanist, physician, 1709–1773) [Raven 1963 Reinwardtia 6:327–427] Many polyploids.
Perennial herb or subshrub, 14–31(45) dm, occasionally with thick white spongy roots at floating nodes. Stem: prostrate to erect, flower shoot erect, ± branched distally, generally ± glabrous. Leaf: alternate, 3–10(13) cm, petiole (0)1–20(33) mm; blade narrowly elliptic or oblanceolate to widely obovate, entire, ± glabrous with hairy midrib to spreading-hairy, tip generally not mucronate. Inflorescence: bracts lanceolate to lance-ovate; pedicel 13–25(47) mm. Flower: sepals 5(6), 8–12(15) mm; petals 5, 15–18(20) mm; stamens 10(12) in 2 unequal sets, anthers 1.7–2.3 mm. Fruit: generally reflexed, falling with pedicel; 13–25(27) mm, generally cylindric, tapered to pedicel, ± glabrous. Seed: 0.8–1 mm, embedded in woody piece of inner fruit wall.
2n=48. Streambanks, shores; < 300 m. South Coast, Peninsular Ranges; southeastern and southern United States, Central America (native?), southern South America. [Jussiaea uruguayensis Cambess., in part] Invasive weed of emergent wetlands, ponds. May–Nov [Online Interchange]
Previous taxon: Ludwigia
Next taxon: Ludwigia hexapetala
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 1 2014
Citation for this treatment: [Author of taxon treatment] 2013. Ludwigia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=31664, accessed on Aug 1 2014
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