Flora of Barro Colorado Island

Phyllanthus acuminatus

Vahl, Symb. Bot. 2:95.1791

P. conami Sw.


Glabrous, soft-wooded, monoecious herb or shrub, usu­ally less than 3 (8) m tall, sparsely branched, the branches usually bipinnatiform (the earliest simply pinnate), the primary axis to 65 cm long, margined below branchlets, the ultimate branches 8-20, each 5-25 cm long, with 7-20 leaves. Leaves alternate, simple; stipules triangular, ca 1 mm long, blunt; petioles 1.5-3 mm long; blades ovate to elliptic, gradually acuminate, acute to obtuse at base, 2-4.5 cm long, 1-2.5 cm wide. Flowers apetalous, small, in bisexual cymules in axils of ultimate branches; staminate flowers 5-20 per cymule; pedicels to 5 mm long; calyx lobes 6, in 2 unequal series, the inner rounded, to 1.2 mm long; disk prominent, trilobate; stamens 3; filaments connate into a short column; anthers fused at base, forming a 3-sided structure, dehiscing laterally; pistillate flowers 1 per cymule; pedicels 5-12 mm long; calyx lobes 6, in 2 series, the inner broadly ovate, to 1.7 mm long; disk cup-shaped, trilobate; ovary trilobate; styles 3, flattened, spreading, bifid at apex. Capsules 4.5-5 mm diam, prominently trilobate, explosively dehiscent; seeds plano-convex, ca 2.5 mm long, smooth, reddish­-brown. Croat 10240.

Occasional, usually in tree falls or clearings; sometimes locally common along the shore. Flowers throughout the year, but principally from February to August. The fruits are mature mostly from July to September. Plants may have mature fruits while still in flower.

Mexico to northern Argentina; West Indies. In Pan­ama, known principally from tropical moist forest in the Canal Zone, Bocas del Toro, Colón, San Blas, Chiriqui, Veraguas, Los Santos, Panama, and Darién; known also from tropical dry forest in Coclé, from premontane moist forest in the Canal Zone, from premontane wet forest in Chiriqui, Coclé, and Panama, and from tropical wet forest in Colón,

Photos from STRI Digital Archive

  • Phyllanthus acuminatus
  • Phyllanthus acuminatus Fruit
  • Phyllanthus acuminatus Flower Fruit Leaf