The Jepson Manual: Higher Plants of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to LUDWIGIA

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Leaves opposite; sepals 4; petals 0 or 4, 1–3 mm, soon deciduous; stamens 4; fruits 1–10 mm, erect; seeds free from fruit wall (sect. Dantia)
 
    2. Petals 0; sepals 1–2 mm; fruit 1–5 mm; pedicels 0–0.5 mm; ovary with 4 green stripes
L. palustris
    2' Petals 1–3 mm; sepals ± 2–5 mm; fruit 4–10 mm; pedicels 0–3 mm; ovary not striped
L. repens
  1' Leaves alternate; sepals 5(6); petals 5(6), 7–30 mm; stamens 10(12) in 2 unequal sets; fruit 10–40 mm, reflexed; seeds embedded in fruit wall (sect. Oligospermum)
 
    3. Stem generally ascending or erect (sometimes floating or creeping); bractlets obovate; petioles 3–23 mm; sepals (8)13–19 mm; petals (15)20–30 mm
L. hexapetala
    3' Stem generally floating or creeping; bractlets deltate; petioles 3–60 mm; sepals 3–12 mm; petals 7–24 mm
L. peploides
      4. Plants spreading-hairy; leaf tip glandular; fruit 25–40 mm
subsp. montevidensis
      4' Plants generally subglabrous; leaf tip not glandular; fruit 10–25 mm
subsp. peploides


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