Monographs Details: Panicum subinclusum Swallen
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 - Perenne; culmi erecti 30-45 cm alti, pauciramosi; vaginae internodiis paulum breviores, glabrae; ligula arcuata, 0.5-1 mm longa; laminae 2.5-6.5 cm longae, 3-9 mm latae, acutae, appressae, basi sparse longe pilosae; paniculae usque ad 6 cm longae, 2 cm latae ramis gracilissimis adscendentibus; spiculae 1.1-1.2 mm longae, acutae, pilosae vel papilloso-pilosae; gluma prima acuta vel subacuta spicula ca. 1/2 brevior; gluma secunda obtusa fructu brevior; lemma sterile subacutum fructu longius; fructus 1 mm longus, plano-convexus, subacutus.
Species Description - Perennial; culms erect, 30-45 cm high, sparingly branching, the branches apparently somewhat spreading; sheaths nearly as long as the internodes, glabrous; ligule high-arcuate 0.5-1 nun long; blades 2.5-6.5 cm long, 3-9 mm wide, acute, narrowed toward the base, bearing a few long hairs on the upper surface toward the base, appressed; panicles as much as 6 cm long, 2 cm wide, or smaller on the branches, partly enclosed in the sheath, the very slender branches ascending; spikelets 1.1-1.2 mm long, acute, pilose or papillose-pilose; first glume acute or subacute, half as long or a little more than half as long as the spikelet; second glume obtuse, shorter than the fruit; sterile lemma subacute, slightly exceeding the fruit, containing a well developed palea and staminate flower; fruit 1 mm long, strongly plano-convex, subacute.
TYPE: locally abundant, wet places on rocks, 15 km above San Fernando de Atabapo, Rio Atabapo, Ri'o Orinoco, Amazonas, Venezuela, October 17, 1950, Bassett Maguire 29271; U. S. National Herbarium No. 2,040,199.
The perennial habit, relatively small, partly included panicles, and large appressed blades are characteristic.