Jepson eFlora: Taxon page
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Ludwigia peploides subsp. peploides

Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key

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 Patterson, Bruce G. Baldwin.
Genus: LudwigiaView DescriptionDichotomous Key

Habit: 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.
Species In Genus: 82 species: +- worldwide. Etymology: (C.G. Ludwig, German botanist, physician, 1709--1773) Note: Many polyploids.
eFlora Treatment Author: Peter C. Hoch & Brenda J. Grewell
Species: Ludwigia peploidesView Description 

Habit: Perennial herb, matted, floating, or creeping. Stem: prostrate to erect, simple or branched. Leaf: alternate, +- clustered, (2)3--8(11) cm; blade oblong to round, +- entire, glabrous to spreading-hairy distally on stem. Inflorescence: bracts deltate. Flower: sepals (4)5(6); stamens (8)10(12) in 2 unequal sets, anthers 0.7--1.5 mm. Fruit: generally reflexed; body hard, +- glabrous to spreading-hairy. Seed: 1--1.5 mm, embedded in woody inner fruit wall. Chromosomes: 2n=16.
Note: May be serious wetland weed.

Ludwigia peploides (Kunth) P.H. Raven subsp. peploides
Habit: Plant (4)6--14(23) dm, (sub)glabrous, not sticky when fresh. Stem: flower shoot floating or creeping. Leaf: tip generally not mucronate; petioles 3--20(35) mm. Flower: sepals 6--10 mm, +- glabrous; petals 5, 9--13 mm. Fruit: pedicel 5--20 mm; body 10--17(20) mm, cylindric or 5-angled.
Ecology: Lakeshores, streambanks, seasonal wetlands; Elevation: < 900 m. Bioregional Distribution: NCo, NCoRO, SNF, GV, CCo, SnFrB, SCo, WTR, sw DMoj; Distribution Outside California: Oregon, Texas (native?), Central America, South America, Australia. Flowering Time: May--Oct
Synonyms: Jussiaea repens L. var. peploides (Kunth) Griseb.; Jussiaea repens var. californica S. Watson; Jussiaea californica (S. Watson) Jeps.
eFlora Treatment Author: Peter C. Hoch & Brenda J. Grewell
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Previous taxon: Ludwigia peploides subsp. montevidensis
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botanical illustration including Ludwigia peploides subsp. peploides


Citation for this treatment: Peter C. Hoch & Brenda J. Grewell 2017. Ludwigia peploides subsp. peploides, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on April 29, 2017.

Geographic subdivisions for Ludwigia peploides subsp. peploides:
NCo, NCoRO, SNF, GV, CCo, SnFrB, SCo, WTR, sw DMoj;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.