Jepson eFlora
Key to families | Table of families and genera

Key to Ludwigia

View taxon page for Ludwigia

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

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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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