Flora of Barro Colorado Island

Ludwigia octovalvis

(Jacq.) Raven, Kew Bull. 15:476.1962

Jussiaea suffruticosa L.

Aquatic herb, usually to 1.5 m tall; stems usually branched and weakly or rather densely pubescent. Leaves variable, sessile or short-petiolate, lanceolate or oblong to linear, acute to acuminate at apex, acute to attenuate at base, the larger leaves 6-15 cm long, 0.5-3.5 cm wide. Flowers solitary in axils,       4-parted; sepals ovate or lanceolate, 3-15 mm long; petals obovate, yellow, rounded or emar­ginate at apex, to 1.5 cm long; stamens 8, in 2 series, the outer 4 opposite petals, the inner 4 around style, longer than style in bud; anthers extrorse; style 1.5-3.5 mm long; stigma ± globular, held just above anthers at anthesis. Capsules ± cylindrical, 2-5 cm long, striate with 8 darker ribs, weathering at maturity, splitting apart longi­tudinally; seeds multiseriate in each locule, free, minute, with the raphe enlarged and as large as body of seed, the seeds dispersed by wind and water. Croat 6863, 15245.

Common along the shore, usually in standing water, occasionally as an epiphyte on floating debris. Flowers and fruits principally in the rainy season.

This species as treated here includes both Jussiaea suf­fruticosa L. var. octofila (DC.) Munz and var. ligustri­folia (H.B.K.) Griseb. as treated by Munz in the Flora of Panama (1959).

Throughout the tropics of the world. In Panama, ecologically variable; known from tropical moist forest

in all areas, from tropical dry forest in Coclé, from pre­montane wet forest in Chiriqui, from tropical wet forest in Colón, Coclé, and Darién, and from lower montane wet forest in Chiriqui.

See Fig. 440.

Photos from STRI Digital Archive

  • Ludwigia octovalvis
  • Ludwigia octovalvis on the shore of Lake Gatun
  • Ludwigia octovalvis on the shore of Lake Gatun
  • Ludwigia octovalvis on the shore of Lake Gatun
  • Ludwigia octovalvis on the shore of Lake Gatun
  • Ludwigia octovalvis on the shore of Lake Gatun
  • Ludwigia octovalvis on the shore of Lake Gatun
  • Ludwigia octovalvis on the shore of Lake Gatun