Monographs Details: Piper striatifolium Yunck.
Authority: Maguire, Bassett & Wurdack, John J. 1957. The Botany of the Guiana Highland -- Part II. Mem. New York Bot. Gard. 9 (3): 235-392.
Description:Latin Diagnosis - Frutex [?], internodiis superis perconferte luteo-villosis; foliis anguste oblongo-ellipticis, apice attenuatis longe acuminatis, basim versus angustatis obtusis subcordulatisve a lamina media pinnatim venosis, nerviis ucrinque 3 vel 4 subtus proeminentibus supra valde sulcatis, supra glabris subtus villosis, petiolo brevi conferte villoso ad basim vaginato; drupa truncato-obovoidea subtetragona glabra, stigmatibus sessilibus.

Species Description - Shrub [?]; twigs slender, nodose, the upper internodes 1-2 cm long, very densely yellow-villous, the hairs up to lmm or more long. Leaves narrowly oblong-elliptic or lance-oblong, with attenuately long-acuminate apex, the acumen 10-15 mm long, narrowing to the rounded, obtuse, or slightly cordulate base, one side 1-2 mm longer at the petiole, 2.5-3.5 cm wide and 14-16 cm long, pinnately nerved from the lower half, the nerves 3 or 4 on each side, strongly salient beneath and deeply impressed above, nearly straight and sub-parallel, with slender cross-connecting nervules, glabrous above, villous beneath, the nerves rather densely so, drying firm, opaque, revolute, the petiole scarcely 5 mm long, densely villous, vaginate at the base. Spikes 3 mm thick and 5-6 cm long, the peduncle about 1 cm long, villous, the bracts rounded-subpeltate, fringed, the drupe truncate-obovoid, subtetragonous, glabrous, glandular, the stigmas sessile.


TYPE: BRAZIL: Upper Rio Negro River, Weiss & Schmidt in 1907-08 (NY).

The densely villous stems, narrow leaves with irapressed-salient nervation and comparatively short, stout spikes characterize this species. The impressedsalient nerves somewhat resemble those of P. lineatum R. & P. of Peru and Ecuador, but this species differs in the size and shape of its non-scabrid leaves and the character of the indument. In the shape of the leaves and the type of venation it resembles P. jaboncillanum Trel. & Yun. of Colombia. It differs, however, in its pubescence, fewer nerves, and shorter, straight spikes.