Ludwigia peploides subsp. peploides |
Ludwigia peploides subsp. glabrescens |
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floating primrose-willow, floating water primrose, Matted water primrose |
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Stems | glabrous or sparsely villous. |
glabrous. |
Leaves | alternate or fascicled; stipules symmetrical; petioles of basal leaves 0.3–0.8 cm, those of distal leaves 0.2–2.5 cm; blade 0.8–4(–8.5) cm, apex sometimes glandular-mucronate, surfaces shiny, glabrous, rarely ciliate or minutely pellucid-punctate. |
alternate, usually not fascicled; stipules symmetrical; petioles of basal leaves 0.7–2.5 cm, those of distal leaves 0.7–6 cm; blade (2–)4–10 cm, apex eglandular-mucronate, surfaces shiny, glabrous. |
Flowers | anthers on short filaments 0.5–1.1 mm, those on long filaments 0.8–1.2 mm; ovary 6–14 mm, apex truncate, glabrous or with scattered hairs, stigma usually as long as anthers, rarely exserted beyond them. |
anthers subequal, 1.2–1.4 mm; ovary 14–20 mm, apex somewhat broader, glabrous or with scattered hairs, stigma usually exserted beyond anthers, rarely as long as anthers. |
Capsules | 10–17(–25) × 2–3 mm, pedicel 10–35 mm. |
25–40 × 3–4 mm, pedicel 35–90 mm. |
Seeds | 7–14 per locule. |
16–18 per locule. |
2n | = 16. |
= 16. |
Ludwigia peploides subsp. peploides |
Ludwigia peploides subsp. glabrescens |
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Phenology | Flowering summer–early fall. | Flowering summer-early fall. |
Habitat | Wet places, along slow-moving rivers, streams, canals, ditches, often growing into main channels as aquatic weeds. | Wet places, along slow-moving rivers, streams, canals, ditches, often growing into main channels as aquatic weeds. |
Elevation | 0–900[–3000] m. (0–3000[–9800] ft.) | 0–900[–3000] m. (0–3000[–9800] ft.) |
Distribution |
AZ; CA; NM; OR; TX; Mexico; Central America; South America; West Indies (Cuba); Pacific Islands (Galapagos Islands) [Introduced elsewhere in Pacific Islands (Society Islands), Australia] |
AL; AR; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NE; NJ; NY; OH; OK; PA; SC; TN; TX; VA; WV; South America (Venezuela) |
Source | FNA vol. 10. | FNA vol. 10. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Jussiaea californica, J. diffusa var. californica, J. repens var. californica | Jussiaea repens var. glabrescens, J. boydiana, L. peploides var. glabrescens |
Name authority | unknown | (Kuntze) P. H. Raven: Reinwardtia 6: 394. (1964) |
Web links |