542 GRAMINEiE. 



with a bluntish point, shortly pedicellate, glabrous : sterile glumes 3-5 -nerved. — P. Swartzi- 

 anum, Flugg.—Z'-V high ; spikes 3"-V', spikelets 1"'-|'" long.— Hab. Jamaica.!, Pd., 

 AL, March, Wils., common in dry pastures ; Trinidad !, Pd., in savannahs. 



69. P. pulchellum, Kth. Rhizome crespitose; stem slender, erect; leaves narrow, 

 pilose ; spikes 2-3, one terminal, the other subapproximate : axis 3-gonal, flattish on the 

 back, glabrous with a villous tuft at the base, narrower than the spikelets ; spikelets 2-serial, 

 elliptical, blunt, shortly pedicellate, glabrous : sterile glumes 3-nerved, lower (second) much 

 shorter than the flower, caducous or abortive.— Kth. N. Gen. t. 26.-2' high ; leaves l'"-J'" 

 broad^ spikes 2"-l", spikelets |'"-1'" long: glume purplish. — Hab. Trinidad! Lockh.; 

 [Venezuela, equal. Brazil!]. 



§ 3. Spikelets i-seriate in pairs, or 1-Z-seriate by abortion of one of the pedicels in each 

 pair, fertile convex glumes of the exterior spikelets placed against the axis, of the in- 

 terior ones turned more or less to the opposite side. 



* Spike 1, terminal, the other (if present) inserted lower down. 



70. P. decumbens, Sw. ! Stoloniferous ; leaves flat, hairy : sheath loose : peduncles 

 slender, from the upper axils of the branched stem ; spikes single, incurved : axis filiform, 

 glabrous (or pilose below) ; spikelets 4-seriate in pairs, pedicellate, roundish, miuutely 

 and bluntly mucronate or rounded, glabresceut : sterile glumes 3, two superior 3-nerved, 

 lowest deltoid, minute (rarely abortive), second shorter than the flower, third furnished with 

 a palea— Kth. R6v. t. 16. Trin. Ic. 1. 146.— Panicum, R. S. P. protensum, PL Spruce I 

 An anomalous congener, hut closely approaching the following species ; l'-2' high, slender ; 

 leaves short, 4'"-2'" broad; spikes 1" long: spikelets \'"~l n ' diam.— Hab. Jamaica!, 

 Sw., in arid sandy hills of the western districts ; Trinidad !, Lockh., Cr. ; [Venezuela ! to 

 Brazil!]. 



71. P. setaceum, Mich. Rhizome creeping ; leaves flat, pilose ; spikes 2-1 (-3), slen- 

 der, slightly incurved, one terminal, inferior usually distant : axis linear, flat on the back, 

 glabrous, narrower than the spikelets ; spikelets 4-seriate in pairs or 2-3-seriate, pedicellate, 

 roundish, blunt, glabrous (rarely puberulous) : sterile glumes 2, equalling the flower, obso- 

 letely nerved.— Trin. Ic. t. 129, 130.— P. dasyphvllum, Ell. P. ciliatifolium, Mich. P. 

 long'ifolium, Steud.—V-2' high ; leaves 4"-2' r broad : spikes 2"(-4") long : spikelets 4'" 

 diam. — Hab. Antigua !, Wullschl. ; [United States ! to Brazil !]. 



72. P. csespitosum, Ftugg. Rhizome creeping ; leaves flat, glabrous, except at the 

 base ; spikes 1-4, slender, one terminal, the other distant : axis linear, flattish on the back, 

 glabrous, narrower than the spikelets ; spikelets 4(-3)-seriate in pairs, elliptical, blunt, pe- 

 dicellate, glabrescent : sterile glumes 3-5-nerved. — Trin. Ic. t. 121. — P. dissectum, Sw. 

 (non L.) P. rhizomatosum and coleopodum, Sieud. — £''-H" long ; leaves 2"'-14'" broad ; 

 spikes l"-2", spikelets £'"-!'" broad.— Hab. Jamaica !, Wullschl., AL, on dry pastures ; 

 [Cuba ! to Guiana !]. 



73. P. fimbriatum, Kth. Csespitosc, erect ; leaves broadly flat, ciliate ; spikes 2-7, 

 one terminal, the other distant : axis 3-gonal, flat on the back, glabrescent (except at the 

 base), narrower than the spikelets; spikelets 4-seriate, ovale, blunt, mucronate, pedicellate: 

 sterile glumes 3-nerved, both or inferior (the second) crested with a broad, lacerate, mar- 

 ginal wing. —Kth. Nov. Gen. t. 28.— l'-iy high; leaves 4"'-8"' broad, inferior long; 

 spikes l"-2", spikelets (without the wing) V" long : wing \ m -\'" broad, rusty. — Hab. An- 

 tigua!, Wullschl.; [New Granada, Brazil]. 



74. P. glabram, Poir. Ca?spitose, erect ; leaves long, flat, glabrous ; spikes filiform, 

 3-10, slightly nodding, one terminal, the other distant, often one-sided : axis linear, convex 

 on the back, glabrous (except at the base), narrower than the spikelets ; spikelets 4-3-seriate 

 with the pairs somewhat distant, obovate-oblong or elliptical-oblong, blunt, puberulous or 

 glabrescent, unequally pedicellate : sterile glumes 3-nerved. — Trin. Ic. t. 126. — P. ischno- 

 caulon, Tr. P. milioides, Poir. : a form with 6"-8" long, numerous spikes. — 3' high ; 

 leaves about 2'" broad; spikes 6"-2"(-8"), spikelets 1'" long, the"latter greenish.— Hab. 

 Antigua!, Wullschl.; [Haiti to S. Thomas] . 



75. P. plicatulum, Mich. Csespitose, stout, erect ; inferior leaves long; spikes 3-12, 

 one terminal, the other distant : axis 3-gonal, flattish on the back, glabrous (except at the 



