Flora of Barro Colorado Island

Talisia nervosa

Radlk., Smithsonian Misc. Collect. 61(24):4.1914

Mamón de monte

Polygamous shrub or small tree, usually less than 5 m tall; trunk to 6 cm dbh, unbranched (unless previously dam­aged). Leaves pinnately compound, clustered near apex, often 1 m or more long, lacking reduced leaflets at apex; petioles ca 25 cm long, terete; petiolules swollen, 5-10 mm long; leaflets usually in 5-8 pairs, oblong-elliptic, acute at apex and base, 20-45 cm long, 6.5-13 cm wide, glabrous above, glabrous to puberulent below. Thyrses small, arranged in panicles to 70 cm long, widely branched, the major branches ribbed; branches, pedicels, and calyces puberulent to tomentulose; pedicels short, to 2 mm long, articulate below calyx; calyx bowl-shaped, to ca 2 mm long, 5-lobed to about middle, the lobes indurate, acute, ciliate; petals 5, oblong, white, 3-5 mm long, acute to blunt at apex, spreading above calyx, gla­brous, the scale ± exceeding petal, sericeous, tufted and slightly spreading at apex; disk raised, 5-angulate, the points alternating with petals; stamens 5 or 8, equaling scales, 3 often reduced or aborted; filaments weakly pu­bescent, shorter than anthers; anthers oblong, l-4 mm long, the connective beaked at apex; staminate flowers with the ovary densely pubescent, less than 1 mm long; style lacking; stigmas 3, minute, hidden by the pubes­cence of ovary; bisexual flowers with the ovary ovoid; style nearly glabrous, about as long as ovary; stigmas capitate, held at about the level of anthers. Fruits ± ellipsoid to globose, brown, sharply apiculate at apex, sparsely pubescent, minutely lenticellate, usually 2-3.5 cm long, with a thick (2-3 mm) woody pericarp; seeds ellipsoid, flat on side if more than 1,1.5-2.5 cm long, embedded in a firm or jellylike, whitish to orange meso­carp. Croat 8236, 14921.

Occasional in both the young and old forests; abundant along Snyder-Molino Trail 400-700. Flowers in the dry season (December to April), with the fruits maturing in the middle to late rainy season, chiefly from July to October.

The genus Talisia is said to be polygamodioecious, i.e., functionally dioecious but with a few bisexual flowers or flowers of the opposite sex. However, at least some speci­mens of this species are polygamous, i.e., with large num­bers of both bisexual and staminate flowers.

Costa Rica to Colombia. In Panama, known from tropical moist forest in the Canal Zone, Bocas del Toro, Veraguas (Coiba Island), Panama, and Darien and from tropical wet forest in Colón (Santa Rita Ridge) and Darien.

Photos from STRI Digital Archive

  • Talisia nervosa flower
  • Talisia nervosa Inflorescence
  • Talisia nervosa immature-fruit
  • Talisia nervosa immature-Infructescences
  • Talisia nervosa seed-dry
  • Talisia nervosa
  • Talisia nervosa
  • Talisia nervosa
  • Talisia nervosa Fruit
  • Talisia nervosa Flower Leaf