Schefflera robusta (A. C. Sm.) A. C. Sm.

Schefflera robusta A. C. Smith,
Trop. Woods 66: 5. 1941.
Sciodaphyllum robustum A. C. Smith, Brittonia 2: 254. 1936.
Small tree (?), the young parts cinereo-puberulent, soon glabrous, the branchlets stout, terete, rugose; petioles terete, lenticellate, up to 55 cm. long or more, sheathing at the base, the ligule coriaceous, oblong-lanceolate, 3-9 cm. long; leaflets 8-21, the petiolules subterete, 4-20 cm. long, the blades thin-coriaceous, elongate-oblong, (12-) 15-30 cm. long, 4-11 cm. broad, obtuse or rounded at the base, caudate-acuminate at the apex (the acumen 2-3 cm. long), entire at the margins, the costa and 8-20 pairs of secondary nerves somewhat prominent; inflorescence terminal, robust, compound-paniculate, up to 60 cm. long, the branches numerous, 30-50 cm. long, the peduncles 3-10 mm. long; flowers sessile, the heads compact, 3-6 mm. in diameter at anthesis, 10-20-flowered; flowers 5-merous, glabrous, the calyx cupuliform, small, the limb minute, truncate or undulate; petals membranous, valvate, connate, deltoid, about 1.5 mm. long; filaments slender, about 1.5 mm. long, the anthers small, globose-oblong; styles 5, about 1.5 mm. long, coherent into a carnose column, free at the apex; locules and ovules 5; fruits about 5-15 per head, sharply 5-angled, about 3 mm. in diameter, with a thick stylar column about 1.5 mm. long, the styles shortly free and spreading at the apex.
Type locality: Costa Rica. Distribution: Costa Rica and Panama.