Monographs Details: Clusia orthoneura Standl.
Authority: Maguire, Bassett & Wurdack, John J. 1958. The botany of the Guayana Highland--Part III. Mem. New York Bot. Gard. 10: 1-156.
Description:Species Description - Medium-size tree, 12-18 m high, the branchlets slender, scurfy-rimose, sulcate when dry; leaf-blades oblanceolate, coriaceous, acuminate or merely obtuse at the apex, acute at the base, 6-12 cm long, 2.5-3.5 cm broad, the midrib extending to the middle of the blade, the lateral veins prominulous, ascending at angles of 75-80° and parallel above; petiole 8-14 mm long; inflorescence open, (1) 5-7-flowered; sepals apparently 6; petals apparently 6, ca. 3 cm long, obovate, "pinkish white''; staminal column ca. 6 mm high, 7 mm thick, glutinous, thick-walled, the central cavity narrow, the central staminodial mass lacking; stamens extrorse, ca. 20, the filaments 6-7 mm long, the anthers 2.5 mm long, strongly incurved; pistillate flowers unknown.
Type: epiphytic tree 40-60 ft high, 2-3 inches diam., petals pinkish-white; stamens yellow, a very sticky substance collected at base; at 3600 ft alt,, Mt. Chapon. nw Bogota, extreme western part of Dept. Boyaca, Colombia, June 2. 1932, A. E. Lawrance 131.
Clearly, in the sect. Cochlanthera, C. orthoneura stands next to C. cochlanthera, as indicated by the comparatively few stamens. The leaf character of C orthoneura is unique in the section.