Monographs Details: Zanthoxylum annulatum Rusby
Authority: Rusby, Henry H. 1927. Descriptions of New Genera and Species of Plants Collected on the Mulford Biological Exploration of the Amazon Valley 1921-1922. Mem. New York Bot. Gard. 7: 205-387.
Family:Rutaceae
Description:Species Description - (Fruiting specimens.) Glabrous, the branchlets very stout, terete, gray, finely wrinkled in drying. Petiole and rachis slender, terete, ascending, 10 to 18 cm. long, sparsely and finely black-dotted. Leaflets mostly 5 or 7, thin and membranaceous, bright-green, the lower successively smaller. Petiolules 5 to 10 mm. long, channeled, finely whitish annulate and wrinkled. Blades 8 to 15 cm. long, 4 to 7 cm. wide, oval, acute or short-acuminate at the base, rounded and cuspidate at the summit, the venation very slender, lightly prominent beneath, the secondaries about 12 on a side, widely spreading and lightly and irregularly anastomosing at some distance from the margin, the reticulation obscure. Panicles lateral, sessile, short and dense, the pedicels short and thick, the 2 or 3 carpels subsessile, compressed and lightly keeled, strongly reticulate-pitted, greenishbrown, 6 mm. long, about 3 mm. wide, obovoid with rounded summit. Seed black, somewhat shining, reticulate-wrinkled.

Distribution:Bolivia South America|