552 GRAMINE.E. 



Hab. Jamaica !, all coll., in moist mountain- woods (o, (3) ; Antigua !, Wulhchl. (0), 

 Dominica !, Imr. (j3) ; Trinidad !, &ck. (o) ; [Pauama !, Peru !]. 



120. P. compactum, Sw. Herb. ! (». sp.) Erect ; leaves oblong-lanceolate, acumi- 

 nate, glabrous ; panicle dense, ovoid : branches compound, whorled ; pedicels usually as 

 long as the spikelet : spikelets globose-ellipsoidal, pointed, yellowish-green ; 2 superior 

 sterile glumes roundish, equal, 7-9-nerved, as long as the roundish-ovoid, blunt fertile 

 flower. — P. arundinaceum, var. Sw. herb. ! : confounded by him with Isachne, but well 

 distinguished by him in his other label.— Leaves 5"-6" long, 1" broad : sheath glabrous; 

 panicle 4" long, 2" broad ; spikelets very numerous, \\ m long. — Hab. Jamaica!, Sw. 



121. P. martinicense, Gr. Erect ; leaves lanceolate-acuminate, puberulons ; panicle 

 spreading-erect : branches simple, or slightly compound, fascicled, the lowest included at 

 the base withiu the uppermost sheath : pedicels unequal, scabrous : spikelets ellipsoidal, 

 pointed, brownish-green ; 2 superior sterile glumes elliptical, equal, 7-13-nerved, exceed- 

 ing the elliptical-oblong, blunt fertile flower.— P. fuscum, Sieb. Mart. 2jL (P. glutinosum, 

 PH., non Sw.) P. divaricatum, Kth. Rev. t. 29 (non L.) : apparently the same.— Leaves 

 5"-6"long, 6"'-8'" broad: sheath glabrescent ; panicle 4"-2'' long, 1" broad : branches 

 longer than in the preceding, spikelets rather distant, 2'" long : nerves of the third plume 

 counected above, as in all the preceding species of Lasiacis. — Hab. Jamaica!, Wullschl. ; 

 [Martinique !, Panama !, Guiana]. 



Sect. 5. MaiAErA, Tr. emend. — Fertile flower biconvex: sterile glumes appressed to it, 

 submembranactous. Spikelets ellipsoidal, or obovate, paniculate : pedicels filiform, or 

 hair -like. 



122. P. glutinosum, Sw. Perennial, stout ; leaves long, lanceolate, or lanceolate- 

 linear, acuminate ; panicle large : lower branches whorled, little compressed : whorls dis- 

 tant : pedicels geminate, long, filiform, distant : spikelets ellipsoidal, or obovate, with a 

 bluntish point: all glumes subequal, the 2 inferior viscous, growing blackish, 5-7 -nerved, 

 third with a palea ; fertile flower ellipsoidal, pointed, terete, equalling the glumes, smooth.—- 

 3'-4' high ; leaves 12"'-4'" broad, in the West Indian grass ciliate with a glabrous sheath, 

 (in a Brazilian form the sheath is hispid) ; panicle usually 1' long, often fastigiate ; spike- 

 lets 1"'-H'" long.— Hab. Jamaica !, Pd., Wullschl., in mountain-woods ; [Cuba!, Vene- 

 zuela !, Peru !, Brazil !]. 



123. P. trichanthum, Ns. Perennial, dichotomously branched below ; leaves lanceo- 

 late, acuminate, subcordate at the base, puberulous : sheath glabrous ; panicle diffuse, spread- 

 ing: branches often fascicled, inferior compound: pedicels long, hair-like: spikelets ellipsoidal , 

 pointed, glabrous ; lowest glume minute, blunt, 2 superior equalling the flower, 3-5-nerved, 

 third devoid of a palea; fertile flower ellipsoidal, pointed, nearly terete, smooth. — P- t rl ' 

 choides, Kth. {non Sw.) — Several feet high, somewhat woody below ; leaves 3"-4 long. 

 5"'-9'" broad ; panicle 6"-8" long and broad ; spikelets i" long.— Hab. Jamaica \, Pd., 

 rare, Westmoreland ; [Mexico !, Guiana !, Brazil !]. 



124. P. brevifolium, L. Annual, geniculate-rootiug at the branched base; leavea 

 oblong-lauceolate, acuminate, rounded at the base -. sheath pilose ; panicle diffuse, spreading : 

 branches scattered, inferior compound : pedicels long, hair-like : spikelets obovate, bluntisn, 

 puberulous ; lowest glume i(- j) as long as the spikelet, 2 superior equalling the flower, 

 3(-5)-nerved, third with a small palea ; fertile flower ellipsoidal, bluntish, smooth, at 

 length nearly terete : palea slightly convex. — SI. 1. 12. f. 3. — P. trichoides, Sw., Sieb. Mart. 

 28.— Spithameous -2' high ; leaves l"-2i" long, 4"'-9* long ; panicle 3"-6" long, not quite 

 as broad; spikelets \'" long.— Hab. Jamaica!, Marsh, Wils. ; Dominica !, Imr. ; Trinidad., 

 Sch. ; [Cuba! and Mexico! to Brazil!]. 



125. P. cyanescens, Ns. Perennial, slender, erect, leafy below, glabrescent ; leaves 

 lanceolate-acuminate, rigid : ligule ciliate ; panicle loose, spreading : branches scattered, 

 lower compound: pedicels long, hair-like : spikelets ovoid, blunt, glabrous ; lowest glume 

 exceeding half the spikelet, 2 superior equalling the flower, ^-nerved, third with a palea; 

 fertile flower ovoid, bluntish, smooth, terete. — Trin. Ic. I. 230. — P. 8, PI. Spruce.— Stems 

 several, V-2' high ; leaves 2"'-4'" (-5'") broad, striate ; panicle 2"-4", spikelets | m -l 

 long; third glume <J, or neutral. — Hab. Trinidad!, Pd., Lockh., Cr., in wet savannahs; 

 [Texas! to Brazil!]. 



