Monographs Details: Stenopadus
Authority: Maguire, Bassett & Wurdack, John J. 1957. The Botany of the Guiana Highland -- Part II. Mem. New York Bot. Gard. 9 (3): 235-392.
Scientific Name:Stenopadus

In 1953* we recognized six species in Stenopadus proper (Eustenopadus Blake), all endemic to the Guayana Highland. Now, as a result of further exploration, eight additional species have been collected (two of them to be described in the succeeding paper) in Venezuelan Guayana, and one, S. colombianus Cuatr. & Steyerm., has been described from Colombian Guayana.

Heads massive, terminal, solitary (in three species sometimes 2-4), homogamous, multiflowered [(15) 40-100]; receptacle glabrous, alveolate, strongly or sometimes not at all paleaceous; corolla actinomorphic, carnose, essentially infundibuliform and differentiated into a cylindric tube, an expanded limb, and tightly coiled, linear-lanceolate lobes, the tubular portion much exceeding the lobes, characteristically 3 (sometimes only 2) distinct veins extending from the base of the corollas into the lobes; anthers caudate-sagittate, the adjacent tails connate; filaments attached either in the sinus of the lobes, at the union of the tube and the limb, or below this union; pollen grains yellowish, tricolpate, the furrows long-pointed; grains prolate to subprolate (prolate-spheroidal in S. campestris), spinulose or psilate; polar axis 55-65 fi', achenes prismatic, basically 10-nerved, glabrous; annulus mostly lacking; corona cylindric; pappussetae mostly subpaleaceous, flattened and connate into a ring at the base. Trees.

TYPE species: Stenopadus talaumifolius Blake.