Jepson eFlora
Key to families | Table of families and genera

Key to Ludwigia

View taxon page for Ludwigia

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Leaves opposite; sepals 4; petals 0 or 4, 1–3 mm; stamens 4; fruit 1–10 mm, erect; seed free from fruit wall (sect. Isnardia)

2. Petals 0; sepals 1.1–2 mm; fruit 1.5–5 mm; pedicels 0–0.5 mm; ovary with 4 green stripes ..... L. palustris

2' Petals 4; sepals 1.8–5 mm; fruit 4–10 mm; pedicels 0–3 mm; ovary not striped ..... L. repens

1' Leaves alternate; sepals (4)5(6); petals (4)5(6), 9–29 mm; stamens (8)10(12) in 2 unequal sets; fruit 10–32 mm, generally reflexed; seeds embedded in woody inner fruit wall (sect. Oligospermum)

3. Bracts lanceolate to lance-ovate; sepals 8–19 mm; petals 15–29 mm

4. Stem generally ± glabrous; pedicels 13–25(47) mm; sepals 8–12(15) mm; petals 15–18(20) mm; fruit 13–25(27) mm, ± glabrous ..... L. grandiflora

4' Stem glabrous to spreading-hairy; pedicels (9)13–25(85) mm; sepals 12–19 mm; petals 18–29 mm; fruit 14–26 mm, ± spreading-hairy ..... L. hexapetala

3' Bracts deltate; sepals 6–14 mm; petals 9–22 mm ..... L. peploides

5. Plant ± spreading-hairy (except stem base); leaf tip generally mucronate; sepals spreading-hairy; petals 10–16(22) mm; fruit (20)24–32 mm ..... subsp. montevidensis

5' Plant generally glabrous to ± glabrous; leaf tip generally not mucronate; sepals ± glabrous; petals 9–13 mm; fruit 10–17(20) mm ..... subsp. peploides


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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