GRAMINE^. 539 



§ 2. Spikeleis imbricate, parallel, one-sided. 

 * Perfect flower lanceolate, shortly ciliate, awned, imperfect narrow. 



53. O. eleusinoides, Gr. Animal, leafy below ; leaves narrowly linear, flat or con- 

 duplicate, blmtish : lia;ule ciliate ; spikes 3-6(-9), digitate -. spikelets very shortly pedicel- 

 late, distaut ; sterile glumes acuminate ; flowers lanceolate, beardless, awned, the perfect 

 shortly ciliate above, the imperlect single ; both awns 3-5 times as long as their glume, the 

 lower inserted below its 2-dentate summit. — SI. t. 68./. 3. — Agrostis radiata, L. — Allied to 

 C. Beyrichiana, Kth. {pycnothrix, Tr.), which has a longer avf n and a much smaller imper- 

 fect flower. Stem inflexed at the base, i'-li' high; leaves i'" broad, lowest a"-4".lopg, 

 superior short: sheath flat-compressed; spikes 2"-li" long, with a villous tuft at the 

 base ; spikelets 1'" distant : perfect flower 2'", imperfect' 1'" long. — Had. Jamaica !, 

 March; Antigua!, Wullschl. 



54. C. radiata, Sw., Kth. Annual, leafy below ; leaves broadly linear, flat, blunt : 

 ligule shortly ciliate ; spikes numerous, in a contracted raceme, uppermost approximate : 

 spikelets very shortly pedicellate ; sterile gluvnes narrowly acuminate ; powers lanceolate, 

 beardless, awned, the perfect dotted, shortly ciliate above, the imperfect single: both, awns 

 3-6 times as long as their glume, the lower terminal between its 3-dentate summit. — Kth. 

 Reo. t. 179. Jacq. Ecloy. Oram. t. 10. — C. gracilis, Dur. {non Kth.) C. glaucescens, 

 Steud. I C. virgata, Sw. sec. Burand. {non Kth.) : a form with the longer sterile glume 

 mucronate. — :l'-2' high ; leaves 2"' broad : sheath flat-compressed ; spikes 3"-2" long, 

 lowest 9"'-4"' distant ; spikelets l"'-4"' distaut : flowBr IJ'" long. — Hab. Jamaica !, 

 Hartw., Pd., Wits., camiaon in fields aud on roadsides; Antigua!, Wa^/scW., Dominica I, 

 Imr.,Ya pastures; Trinidad!, Pd., Lockh., in savannahs; [Cuba! to Brazil!]. 



** Perfect flower elliptical, long-bearded along the margin, awned, imperfect dilated. 



55. C. polydactyla, Sw. Perennial, stout ; leaves linear-acuminate, flat : ligule pilose ; 

 spikes numerous (-3), long, flexnose, digitate: spikelets subsessile; sterile glumes narrowly 

 acuminate ; flowers 2, both half as long as their terminal awn, perfect elliptical, ciliate with 

 a long-exserted beard, imperfect obovate. — SI. t. 65.f.2. Jacq.Kclog. Gram. t.%. — Andro- 

 pogon, L. — 2-3' high ; leaves often 1' long ; spikes 4"-6", flower 1'" long. — Hab. Jamaica !, 

 Pd., March, Wullschl., on di-y, grassy hills; [New Mexico! to Brazil!]. 



56. C barbata, <Sw. Annual, leafy below ; leaves linear-acuminate, flat : ligule pilose ; 

 spikes numerous (-5), digitate : spikelets subsessile ; sterile glumes mucronate ; flowers 3, 

 all long-awned .- perfect elliptical, long ciliate, one-third to one-fourth as long as its infra- 

 terminal awn, 2 imperfect ones cymbiform-ovoid, subtruncaie, shortly exserted. — Trin. le. 

 t. 806. — i'-li' Wgii ; s^pikes often purplish, l"-2", perfect flower 1'" long.— Hab. Jamaica !, 

 March; [Brazil! ; East Indies !]. 



57. C. ciliata, Sw. Annual, erect; leaves linear, flat: ligule glabrescent; spikes 4-6, 

 digitate : spikelets subsessile ; sterile glumes mucronate ; flowers 3, 2 inferior awned : per- 

 fect elliptical, long-ciliate along the margin and keel, as long as the iifraterminal awn, 2 

 imperfect ones cymbiform-subglobose, truncate, subincluded. — Trin. Ic. t. 307. — C. pro- 

 pinqiia, Steud.— \'-^' high; spikes.purplish, incurved at the top, li"-2", perfect flower V" 

 long. — Hab. Jamaica!, Wils., in' arid places; Antigua!, Wullschl.; [Cuba! to French 

 islands ! ; Mexico !] . 



*** Perfect flower ovate, awnless, imperfect dilated, less distant. 



58. C. petraca, Thunb., Sw. Leafy below; leaves flat : sheath flat-compressed ; spikes 

 3-6, digitate: spikelets subsessile; sterile glum.es emarginate : the mphwr shortly awned ; 



flowers beardless, awnless, perfect ovate, shortly ciliate, nmcronate-emarginate, imperfect 

 obovate-ohlong, suhtruncate, included.-^acff. Eclog. Gram. t. 11.— Eustachys, Ilesv. C. 

 Swartzii et septentrionaUs, G. Mull.—V-W high; spikes often brown, \\"-i , perfect 

 flower i'" long. — HAB.,Jamaica !, Pd., along the sea, on limestone, Hanover ; [Bermudas !, 

 Cuba ! ; Southern United States ! to Uruguay ! ; Cape !]. 



.X 28. DACTYLOCTENIUM, W. 



Spikelets several-flowered, closely sessile on one side of a flaltish axis in digitate spikes. 



2 N 



