GRAMINE.E. 539 



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

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



53. C. elausinoides, Gr. Annual, leafy below ; leaves narrowly linear, fiat or con- 

 duplicate, bluntish: ligule ciliate ; spikes 3-6(-9), digitate : spikelets very shortly pedicel- 

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

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

 lower inserted below its 2-deutate summit. — Si. t. 68./. 3. — Agrostis radiate, L. — Allied to 

 C. Begrichiana, Kth. {pycnothrir, Tr.), which has a longer awn and a much smaller imper- 

 fect flower. Stem inflexed at the base, i'-li' high ; leaves V" broad, lowest 2"-4" long, 

 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. — Hab. Jamaica !, 

 March; Antigua!, Wullschl. 



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

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

 spikelets very shortly pedicellate ; sterile glumes narrowly acuminate ; flowers 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 2-dentate summit. — Kth. 

 Ree. t. 179. Jacq. Eclog. Gram. t. 10. — C. gracilis, Bur. (non Kth.) C. glaucescens, 

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

 mucronate. — 1'-2' high ; leaves 2"' broad : sheath flat-compressed ; spikes 3"-2" long, 

 lowest 9"'-4'" distaut; spikelets 1"'-V" distant: flower W" long.— Hab. Jamaica!, 

 Hartw., Pd., Wils., common in fields and on roadsides ; Antigua !, Wullschl., Dominica !, 

 Imr., in 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, flexuose, digitate: spikelets subsessile ; sterile glumes narrowly 

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

 a long-erserted beard, imperfect obooate. — Si. t. 65./. 2. Jacq. Eclog. Gram. t. 9. — Andro- 

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

 Pel., March, Wullschl., on dry, grassy hills; [New Mexico! to Brazil!]. 



56. C. barbata, Sw. Annual, leafy below ; leaves linear-aenminate, 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 one3 cymbiform-ovoid, subtruncale, shortly exserted. — Trin. Ic. 

 t. 306. — a'-l^' high ; spikes 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 ivfraterminal awn, 2 

 imperfect ones cymbiform-mbglobose, truncate, subincluded. — Trim. lc. t. 307. — C. pro- 

 pinqua, Steud. — V-2' high ; spikes purplish, iucurved at the top, l£"-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 glumes emarginate : the superior shortly awned ; 



flowers beardless, awnless, perfect ovate, shortly ciliate, mucronate-cmarginate, imperfect 

 obovate-oblong, subtruncate, included. — Jacq. Eclog. Gram. t. 11. — Eustachys, Besv. C. 

 Swartzii et septentrionalis, 0. Mull. — 1'-2' high ; spikes often brown, 1 V'-2", perfect 

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

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



28. DACTYLOCTENIUM, W. 

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



