Flora of Barro Colorado Island

Serjania paucidentata

DC., Prodr.1:603.1824

Paullinia protracta Steud.

Liana; stems glabrous, 6-ribbed but with 3 more promi­nent, sulcate when young, glabrous; wood composite, the vascular bundles usually 3, small, terete, peripheral. Leaves biternate, glabrous, 8-15 (26) cm long; petioles 1.5-4 (8) cm long, canaliculate on upper surface; rachis narrowly winged; leaflets narrowly elliptic to oblanceo­late, acute to acuminate and often deeply incised on both sides beneath acumen, attenuate at base, 3-13 cm long, 1.8-5 cm wide, thick, mostly entire except for a few crenate, often glandular teeth near apex, the acumen blunt with a gland-tipped apiculum. Inflorescences terminal or usually axillary and borne on tendrils, slender, to ca 20 cm long; pedicels densely tomentose, to ca 1.5 mm long; rachis weakly tomentose; flowers white, to 4.5 mm long; sepals ovate to obovate, densely tomentose outside, glabrous inside, to 2 mm long; petals narrowly obovate, glabrous, to 4.3 mm long, the anterior scales ca three­-fourths as long as petals, stiffly pubescent on margins, the appendage deflexed, slender, extending down to about the middle of the scale, densely stiff-pubescent through­out, the crest slightly bilobed, orange, equaling the length of appendage; disk glands 2 or 4, semicircular, nearly glabrous; stamens villous, flattened; staminate flowers with the stamens to 4 mm long, the pistil minute, 3-sided, hispid at apex; bisexual flowers not seen. Fruits narrowly ovate-cordate, weakly constricted above the cells, 2.3-2.8 cm long, sparsely hispidulous on wing, densely brown-­hispid on cell. Croat 7887.

Infrequent; collected several times along the shore on the east side of the island. Flowers from February to April. The fruits are distributed mostly in the dry season, but may persist until as late as June.

Serjania paucidentata is closest to S. mexicana, but can be distinguished by having larger flowers, hispid fruits, unarmed stems, and composite wood.

Mexico to the Guianas, Brazil and Peru; Trinidad. In Panama, known only from tropical moist forest on BCI. See Fig. 349.

Photos from STRI Digital Archive

  • Serjania paucidentata
  • Serjania paucidentata
  • Serjania paucidentata Timeseries