Flora of Barro Colorado Island

Paullinia rugosa

Benth. ex Radlk., Monogr. Serj. 75.1875

P. fimbriata Radlk.

Liana; stems 5-ribbed, obscurely so in age, ca 2-2.5 cm diam, with milky sap; stems, tendrils, petioles, and ra­chises bearing dense, reddish-brown, hirsute pubescence; tendrils stout, forked. Leaves pinnate; stipules semiorbic­ular, sericeous, to 1 cm diem, the margins fimbriate; peti­oles 5-18 cm long, terete; leaflets 5, opposite, broadly elliptic, acuminate, attenuate to rounded and sometimes inequilateral at base, 12-35 cm long, 7-17 cm wide, hirtellous above on veins, hirsute below especially on veins, bearing apiculate teeth at ends of lateral veins. Thyrses short, closely congested on slender bracteate spikelike inflorescences, simple and borne in axils or on tendrils or compound and terminal; flowers white, ca 3.5 mm long; sepals 5, unequal, tomentulose, orbicular or ovate and acute; petals 4, obovate, the scales with the lateral margin and the distal edge of appendage bearded, the crest orange, weakly lobed, the glands about as broad as long, sparsely pubescent, weakly concave on outside; stamens 8; filaments densely pubescent; ovary and outer surface of styles densely pubescent. Capsules bright red­-orange, suborbicular, to 1.5 cm diem, ±  round in cross section, densely tomentose; seed solitary, subglobular, ca 1 cm diem, black, covered by a thin white aril. Croat 6036, 11783.

Adult plants frequent in the forest; seedlings common and recognizable by the large orbicular fimbriate stipules. Flowers in the late rainy season (August to November). The fruits mature within 1 month.

Costa Rica to Peru and Brazil. In Panama, known from tropical moist forest in the Canal Zone and Colon and from premontane wet forest in the Canal Zone (Pipeline Road), Veraguas, and Panama (Cerro Jefe).

See Fig. 345.

Photos from STRI Digital Archive

  • Paullinia rugosa
  • Paullinia rugosa
  • Paullinia rugosa
  • Paullinia rugosa
  • Paullinia rugosa
  • Paullinia rugosa Timeseries