552 GEAMINEjE. 



Hab. Jamaica!, all coll., in moist mountain-woods (o, /3) ; Antigua I, Wullschl. (/3), 

 Dominica !, Imr. (/3) ; Trinidad !, Sch. (a) ; [Panama!, Peru !]. 



120. P. compactnm, Sw. Herb. I {n. sp.) Erect ; leaves oblong-lanceolate, acumi- 

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

 long as the spikelet : spi/celets 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, IJ'" long. — Hab. Jamaica !, Sw. 



121. P. martinicense, Gr. Srect ; leaves lanceolate-acuminate, pubemlous ; panicle 

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

 the base within the uppermost sheath : pedicels unequal, scabrous : spilcelets ellipsoidal, 

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

 ing the elliptical-oblong, blunt fertile flower. — P. fnscum, Sieb. Mart. 29. (P. glutinosum, 

 Prl., non Sw.) P. divaricatnm, 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 glume 

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

 [Martinique !, Panama !, Guiana]. 



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

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

 hair-like. 



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

 linear, acuminate; |>anicle large: lower br/mches whorled, little compressed: whorls dis- 

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

 bluntisk point : all glumes subeq'ual, the 2 inferior viscous,' growing blackish, 5— 7 -nerved, 

 thii'd 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 l"'-li"' long. — Hab. Jamaica !, Pd., Wullschl., in mountain-woods; [Cuba!, Vene- 

 zuela !, Peru !, Brazil !]. 



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

 late, acuminate, snbcordate at the base, puberulous : sheath glabrous ; panicle difi'use, spread- 

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

 pointed, glabrons ; lowest glume minute, blnnt, 2 superior equalling the flower, 3-5-nervcd, 

 third devoid of a palea ; fertile flower ellipsoidal, pointed, nearly terete, smooth. — P. tri- 

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

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

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



f^ 124. P. brevifoliuiu, L. Annual, gcniculate-rooting at the branched base; leaves 

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

 branches scattered, inferior compound : pedicels long, hair-liice : spikelets obovate, bluntish, 



■ puberulous ; lowest glume i(-J) as long as the spikelet, 3 superior equalling the flower, 

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

 length nearly terete ; palea slightly convex. — SI. t. 72./. 8. — P. trichoides, Sw., Sieb. Mart. 

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

 as broad; spikeletsi"'long.— Hab. Jamaica!, JforjA, Wils. ; Dominica I, 7»!r. ; Trinidad!, 

 Sch. ; [Cuba ! and Mexico ! -io Brazil ! J . 



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

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

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

 exceeding half the spikelet, 2 superior equalling the flower, 5 -nerved, third with a palea; 

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

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

 long; third glume (J, or neutral. — Hab. Trinidad!, Pd., Lockh., Or., vs. wet savannahs; 

 [Texas 1 to Brazil!]. 



