542 GRAMINE^. 



toith a iluntish point, shortly pedicellate, elabroua : sterile glumes 3-5-nerved. — P. Swartzi- 

 aiinm, FMigff. — 3-1' high ; spikes 3"-l , spikelets 1"'-|"' long. — Hab. Jamaica !, Pd., 

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



69. P. pulchellum, Ktk. Rhizome ceespitose; 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 ; spiJielets Z-serial, 

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

 shorter than the flower, caducous or abortive. — Kih. N. Gen. i. 26.-2' high ; leaves 1'"-^'" 

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

 [Venezuela, equat. Brazil !]. 



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

 pair. Fertile convex glnmes of the exterior spikelets placed against the axis, of the in- 

 tenor ones turned more or less' to the opposite side. 



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



70. P. decumbeus, Sw. ! Stolouiferous ; leaves flat, hairy : sheath loose : peduncles 

 slender, ft-om the upper axils of the branched stem ; spikes single, incurved : axis filiform, 

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

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

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

 apalea. — Kth. Rev. t. 16. Trin.Ie.t.\4i6. — Panicum, i2. S. P. protensum, PI. Spruce! 

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

 leaves short, 4"'-2"' broad; spikes 1" long: spikelets V''-i"' diam. — Hab. Jamaica!, 

 Sw., in arid sandy hills of the western districts ; Trinidad !, Lockh., Cr. ; [Venezuela 1 to 

 Brazil!]. 



'' 71. P. setaceum, McA. Rhizome creeping : leaves flat, pilose ; spikes Z-\(-Z), slen-" 

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

 J glabrous, narrower'than the spikelets ; spikelets 4-seriate in pairs or 2-37Seriate, pedicellate, 

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

 • letely nerved.— 75w. Ic. t. 129, 130.— P. dasyphyllum. Ell. P. cUiatifolium, Mich. P. 

 longifolium, Steud. — 1'-2' high ; leaves 4"-3" broad : spikes 2"(-4") long : spikelets \"' 

 diam. — Hab. Antigua 1, Wullschl. ; [United States I to Brazil!]. 

 / 72. P. csespitosum, MUgg. 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. — 2Wb. Ic. t. 121. — P. dissectum, Sw. 

 {non L.) P. rhizomatosum and coleopodum, Steud. — 4"-li" long; leaves 2"'-l|"' broad; 

 spikes l"-2", spikelets i"'-i"' broad.— Hab. Jamaica !, Wull^hl., Al., on dry pastures ; 

 [Cuba! to Guiana!]. 



73. P. fimbriatum, Eth. Csespitose, erect ; leaves broadly flat, ciliate ; spikes 2-7, 

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

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

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

 gma\ wing.— Kth. Nov. Gen. t. 28.— I'-li' high; leaves 4"'-8"' broad, inferior long; 

 spikes l"-2", spikelets (without the wing) 1'" long : wing ■|"'-i"' broad, rusty.- Hab. An- 

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



74. P. glabrum, Poir. Csespitose, 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.— JVw. Ic. t. 126.— P. ischno- 

 oaulon, Tr. P. milioides, Poir.: a form with 6"-S" long, numerous spikes.-TS' ■ high ; 

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

 Antigua!, r«/&(!«.,- [Haiti to S. Thomas]. ^ 



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

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



