Dendropanax sessiliflorus (Standl. & A. C. Sm.) A. C. Sm.

Dendropanax sessiliflorus (Standley & Smith) A. C. Smith, Trop. Woods 66: 3. 1941.
Giliberlia sessiliflora Standley & Smith, Ann. Mo. Bot. Gard. 27: 326. 1940.
Tree, glabrous throughout, the branchlets stout, cinereous, rugose; petioles slender, 3-7 cm. long; leaf-blades chartaeeous or thin-coriaceous, broadly elliptic, 12-20 cm. long, 7-13 cm. broad, obtuse at the base, obtuse or obtusely short-acuminate at the apex, undulate-crenate at the margins, pinnately veined, the costa prominent, the secondary nerves 7-9 per side, arcuate-ascending, slightly raised on both surfaces, the veinlets faintly prominulous; flowerheads probably 10 or more per inflorescence (detached in our specimen), the rachis not seen; peduncles stout, 2.5-4 cm. long, conspicuously bracteate and articulate near the middle (the bracts coriaceous, 3-4 mm. long, connate); flowers capitate, 10-15 per head, sessile, 5 merous, subtended by papyraceous deltoid bracts about 2 mm. long, the receptacle 5-8 mm. broad; calyx obconic or short-cylindric, 2-3 mm. long and about 2 mm. in diameter, the lobes deltoid, acute, about 0.7 mm. long; petals deltoid-lanceolate, 2.5-3 mm. long, 1-1.5 mm. broad, acute and inflexed at the apex; filaments 3 mm. long at anthesis, the anthers subglobose-oblong, about 0.7 mm. long; styles connate into a short carnose column, the stigmas more or less distinct.
Type locality: Panama (Chiriqui). Distribution: Panama (Chiriqui), about 1150m.