GRAMINEJ!. 541 



Sect. 1. EuFASPALTJM. — Spilcelets devoid of an involucre. 

 § 1. Spikeleis ^-seriate. Palea placed against the axis. 



63. P. compressum, Ns. ! Stem compressed, 1-2-node, often brauclied above ; 

 leaves long, flat, usually ciliate : sheath flat-compressed; sjdkes 2-3(-"5''), iieo approxi- 

 mate : axis 3-gomiI, flat on the bank, glabrous, narrower than the spikelets ; spikelets 2- 

 senate, shortly pedicellate, ovate-lanceolate with, a bluntish point, pubescent at the margin 

 or glabrescent : exterior sterile glumes ohsoletely 5-nerved, inferior 4-nerved near the mar- 

 gin. — 'Mn. Ic. t. 118. — Milium, Sw. P. plalycaule, Poir. P. cxtenuatum, Ns. {ex Fl. 

 Spruce.) P. guadalupense and macropodon, Steud. P. Michauxianum, Kth. (P. Digitaria, 

 Poir.) : a form with longer glabrous spikelets. — I'-IV high ; leaves 6''''-4"' broad, lowest 

 shorter and narrower; spikes 4"-2", spikelets 1'" (or 2'" long in F. Michauxianum) . — Hab. 

 Jamaica!, March, Wils., commou in pastures; Antigua!, Wullschl., Dominica!, Imr. ; 

 Trinidad !, Cr. ; [Southern United States! to Buenos Ayres!]. 



§ 2. Spikelets Z-seriate. Fertile convex glume placed against the axis. 

 * Sterile glumes 3- or enerved. 



64. P. conjugatnm, Berg. Stolouiferous ; leaves flat, ciliate : sheath compressed ; 

 spikes 2, divergent, both at the summit of the stem, (or 2-3 with the third distant) : axis 

 linear, channelled on the back, glabrous, about as broad as the spikelets ; spikelets 2-seriate, 

 very shortly pedicellate, roundish ovate, minutely pointed, somewhat villous at the margin :, 

 sterile glumes 2-nerved within the margin. — Trin. Ic. 1. 103. — P. ciliatnm. Lam. P. longis- 

 simum, Hochst. P. Sieberianum and Renggeri, Steud. ! — 1'-2' high; leaves 4"?-3"' broad ; 

 spikes 4"-2", spikelets \"' long. — Hab. Jamaica!, all coll., common; S. Kitts!, Els., An- 

 tigua !, Wullschl., Dominica !, Imr. ; Trinidad !, Sieb., Cr. ; [Louisiana 1 ; Cuba 1 to Braisil ! , 

 Galapagos ! to Australia ! ; trop. Africa!]. 



65. P. pusillum. Vent. Stolouiferous ; stem low, inilexed ; leaves short, flat, glabres- 

 cent, as long as the internodes ; spikes 2-5, most approximate : axis linear, flat on the back, 

 glabrous, narrower than the spikelets; spikelets i-seriate, shortly pedicellate, roundish. 

 Hunt, glabrous : sterile glumes enerved within the margin. — Trin. Ic. t. 273. — P. serpens, 

 Pl.'Spnic.—S"-6" Ugh; leaves 6"'-l 2'" long, 1"'-14"' hroad ; spikes 6"'-8"' long : spike- 

 lets ^"' diam. — Hab. Trinidad !, Cr. ; [Portorico and Mexico to Brazil !]. 



** Sterile glumes Z-h-nerved. 



66. P. distichum, L. Khizome creeping ; leaves convolute or oonduplicate (rarely 

 flat), usually glabrous (except at the base) ; spikes 2, one terminal, the lateral approxi- 

 mate : axis linear, flat on the back, glabrous, narrower than the spikelets ; spikelets 2-se- 

 riate, shortly pedicellate, ovate, pointed, glabrous : sterile glumes 3-5-nerved. — Spikes 1"- 

 2", spikelets l"'-li"' long. 



o. Stem slender ; leaves narrow, linear-acuminate, convolute : sheath biconvex. — Trin. 

 Ic. t. 112. — P. litorale, B.Sr. Digitaria paspaloides, Dub. [non Mich.) 



5. vaginatum, Sw. ! Stems creeping or ascending from the leafy branched base; leaves 

 lanceolate-acuminate, oonduplicate (or flat) : sheath loose, compi-essed. — Trin. Ic. t. 120. 



Hab. Jamaica !, all coll. (o, /S), common in pastures and wet places ; Antigua !, Wullschl. 

 (fi) ; Trinidad !■, Sieb. ; [Bermudas ! and United States ! to Buenos Ayres !, ChiU ! and Juan 

 Fernandez ! ; natm-alized in South-western France ! (a) ; East Indies !, Australia]. 

 ~ 67. P. notatum, Fliigg. Rhizome creeping ; stem simple, erect, or ascending ; leaves 

 lanceolate-acuminate, flat, superior shorter : sheath compressed ; spikes 2, one terminal 

 the other approximate : axis linear, flat on the back, glabrous, narrower than the spikelets ; 

 spikelets %-seriate, ovate-roundish or ovate, blunt, glabrous : stei-ile glumes 3-5-nerved. — 

 Sw. Obs. t.%.f. 1. Trin. Ic. t. 114.— P. distichum, Sw. {non L. : for Linnaeus's descrip- 

 tion is to be referred to the preceding aUied species). P. Michauxianum, «e«<^. in Ft. 

 Philippi, 410 (BOfflXtt.).— Leaves 4'" broad; spikes 2"-l", spikelets 1"-U' long— Hajj. 

 Antigua!, Wullschl.; Trinidad, Cr. ; [Southern United States ; Cuba! to Uruguay]. 



68 P Satoime, Sw. {non Flijgg.) Rhizome osespitose ; stem slender, erect, about as 

 long as the long, filiform, glabrous leaves; spikes single(-" S"), slightly incurved : axis 3- 

 gonal, convex on the back, glabrous, narrower than the spikelets; pikelets 2-sertal, ovate 



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