Monographs Details: Piper fanshawei 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 - Suffrutex glaber; foliis oblongo-ellipticis, apice acuminatis, basi inaequilateraliter acutis, fere totis vel quartum superum pinnatim venosis, nerviis utrinque 5 vel 6 sub margine laqueatis, petiolo a medio deorsum vaginato; bracteis lunatotruncatis dorso fimbriatis, drupa obovoidea apice puberula, stigmatibus parvis sessilibus.
Species Description - Small, glabrous, nodose subshrub, 2 m tall, the upper internodes slender, 2-4 cm long. Leaves oblong-elliptic, acuminate, the base inequilateral, acute, one side about 2 mm shorter at the petiole, 3-4.5 cm wide and 10-14 cm long, pinnately nerved to the upper one-fourth or throughout, the nerves about 5 or 6 on each side, submarginally loop-connected, drying rather thin, translucent, very narrowly revolute, finely pellucid dotted, the petiole about 1 cm long, or occasionally to 2 cm, vaginate-winged below the middle. Spikes 4 mm thick and 2 cm long, apiculate, the peduncle 10-15 mm long, the bracts lunate-truncate, dorsally fringed, the fruits crowded, obovoid, velvety at the truncate-depressed apex, the stigmas small, sessile.
TYPE: BRITISH GUIANA: Pakaraima Mountains, Membaru-Kurupung Trail, occasional in Cunuria forest, alt. 1000 m, Oct. 29 - Nov. 4, 1951, Bassett Maguire & D. B. Fanshawe 32356 (NY).
The glabrous twigs and leaves, type of venation, and especially the strongly velvety fruits distinguish this species. In leaf shape and size, this species bears some resemblance to P. suratanum Trel. & Yun. of Colombia but it differs strongly in its velvety rather than glabrous fruits and with the petioles scarcely vaginate to the middle. It resembles P. riitosense Trel. & Yun. from Aragua, Venezuela, in the size of the spikes. That species, however, has obpyramidal trigonous glabrous fruits and longer leaves with 8-10 branches from each side of the midrib.