Flora of Barro Colorado Island

Stigmaphyllon puberum

(L. C. Rich.) Adr. Juss., Ann. Sci. Nat. Bot., sér. 2, 13:289. 1840

Vine, moderately to densely appressed-pubescent with T-shaped trichomes on most parts. Petioles 1-4 cm long, bearing 2 sessile, lateral glands at apex; blades ovate to elliptic, long-acuminate, obtuse to rounded at base, 8-17 cm long, 3-10 cm wide, glabrous above except on mid­rib, moderately pubescent all over the underside. Pseu­doumbels axillary, serial, to 12 cm long, divaricately branched, usually 1 sessile at each node; peduncles 2-4 mm long, minutely bracteolate at apex; pedicels appearing articulate, 2-5 mm long; inflorescence branches, pedun­cles, pedicels, and calyces densely pubescent; sepals to 4 mm long, ovate-oblong, rounded at apex, held against stamens, 4 bearing 2 broadly oblong glands 2-2.3 mm long, the fifth sepal sometimes with much-reduced glands, the glands with a thin, sticky covering; petals yellow, ± rounded, clawed, to 9 mm broad, the margins fimbri­ate, the 3 opposite the eglandular sepal spreading, usually tinged with purple-violet, the 2 petals on either side of the eglandular sepal ± erect, strongly concave, yellow or purple-violet at center outside; stamens 10, unequal, 4 reduced and sterile; styles 3; stigmas thin and broadly spreading, 1 bilateral. Schizocarps of 3 samaras; samaras pubescent especially on seed, dorsally winged; wing wider at base, 2-3 cm long, to 1.2 cm wide at base, ca 5 mm wide near apex. Croat 11303.

Rare; seen on the shore of Burrunga Point. The flowers were seen in June and July.

Guatemala to Peru, Brazil, and the Guianas; West Indies. In Panama, known from tropical moist forest in the Canal Zone and Darien.

Photos from STRI Digital Archive

  • Stigmaphyllon puberum