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|Family: Onagraceae||View Description||Dichotomous Key|
|Genus: Ludwigia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Ludwigia grandiflora (Michx.) Greuter & Burdet
Habit: 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. Chromosomes: 2n=48.
Ecology: Streambanks, shores; Elevation: < 300 m. Bioregional Distribution: SCo, PR; Distribution Outside California: southeastern and southern United States, Central America (native?), southern South America. Flowering Time: May--Nov Note: Invasive weed of emergent wetlands, ponds.
Synonyms: Jussiaea uruguayensis Cambess., in part
eFlora Treatment Author: Peter C. Hoch & Brenda J. Grewell
Jepson Online Interchange
Previous taxon: Ludwigia
Next taxon: Ludwigia hexapetala
Citation for this treatment: Peter C. Hoch & Brenda J. Grewell 2017. Ludwigia grandiflora, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=31664, accessed on February 21, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 21, 2017.