538 GRAMINEJ;. 



Steud.—Sf&es nnmeioui, 14"-4" long.— Hab. Antigua!, WnllscU. ; Trinidad!, Cr.; 

 [United States I to Venezuela ! ; China ! to East Indies I]. 



49. El. virgata, P. B. Spikelets 6-3-floWered; sterile glumes acuminate, fertile 

 eniarginate, ciiiate, all or the inferior awned: rhachia glabrous. — SI. t. 70. /. 2. — Cynosu- 

 rus, L. L. brachiata and mutica, Steud. — Spikes numerous. 



f a. Spikes 3"-6" long ; awns usually much, rarely little shorter than the flower, none in 

 the superior. 



j3. gracilis, Ns. Spikes li"-24" long ; inferior awns as long as the flower, superior 

 shorter or none. 



7. domingensis, Lk. Spikes 3"-5" long ; all flowers awned : inferior awns as long as 

 the flower. 



Hab. Jamaica!, all coll. (o, iS), in pastures; Antigua!, WuUschl. (a, 7), Dominica !, 

 Imr., (o) ; Trinidad !, Sch., Cr. (7) ; [Texas !, Cuba ! to Brazil ! ; Galapagos !]. 



50. Ii. longa, (Jr. («, */j.). Spikelets 3-4-flowered ; iiesile glurnes oamnmaiR, fertile, 

 minutely 2-dentate, ciiiate, the lowest awned, the following shorter, awnless : rhachis 

 iearded below the flowers. — Habit of the preceding, but spikes 7"-8" long ; and in struc- 

 ture approaching L. Lindleyana, Kth. Several feet high, glabrescent, but sheaths densely 

 ciiiate at the summit ; leaves 8"-10" long, 5 '"-6" 'broad :.ligule reduced; panicle 1' long: 

 uppermost branches approximate : spikelets somewhat distant, compressed ; sterile glumes 

 I", lowest flower 1^", its awn 1'" long : lateral nerves of the fertile glume approximate to 

 the sericeous margin. — Hab. Trinidad !, Or. 



y^ 26. GYMNOPOGON, P. B. 



Spikelets with a single perfect and a distant imperfect flower, sessile in racemed spikes, 

 distantly alternate along the edge of the axis. Both flowers simply awned, or the superior 

 reduced to an awn : sterile glumes narrow, acuminate. Stigmas projecting laterally from 

 the flower. Embryo " small."— Leaves short, tapering from a broader base, spreading. 



51. G. fiUformis, Gr. {n. sp.). Root fibrous ;, spikes long, filiform, flowering to the 

 base ; inferior spikelets gradually more distant and imperfect ; rhachis wii flowers glabrom 

 (except a few hairs at the margin) : ferj:ile linear, one-third as long as its awn, equalling or 

 exceeded by the lower sterile glume, neutral 2-valved, much shorter than its exserted awn ; 

 stamens 2. — Stems caespitose, aphyllous at the base: habit of (?. Icevis, Ns., but more 

 slender, 2' high, glabrous ; leaves distichous, 3"-l" long, 2'" broad, involute, shorter and dis- 

 tant in the numerous sterile shoots : ligular border ciiiate ; panicle 1' long ; spikes alter- 

 nate, 6", spikelets (the awns included) 6'" long ; sterile glumes unequal, linear-acuminate, 

 1 J"'-2"', fertile 14* long ; the latter narrow, minutely 2-dentate, imperfect half as long : 

 both awns little differing in leugth, and palea of the imperfect flower sometimes reduced to 

 2-1 much shorter awns. — Hab. Trinidad !, Cr. 



27. CHLOKIS, Sw. 



Spikelets with l(-2) perfect and 1-seveval imperfect distant flowers, in digitate (or soli- 

 tary) spikes or spiciform racemes, distichous-one-sided. Flowers simply awned, rarely awn- 

 less. Stigmas projecting at or above the middle of the flower. Emiryo large. — Spikes in 

 the West Indian species digitate, rarely contracted-racemose, and perfect flowers shortly 

 bearded at the base. 



§ 1. Spikelets distant, divergent. 



52. C. cruciata, Sw. Annual, leafy below; leaves convolute-filiform: ligule ciiiate; 

 spikes 4-2, digitate, divergent : spikelets shortly pedicellate : sterile glumes acuminate, the 

 longer at length deciduous ; flowers lanceolate, beardless, awned, the perfect shortly ciiiate 

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

 between its 2-dentate summit. — SI. t. 69. /. 1. — Agrostis, L. C. Humboldtiana, Steud.— 

 6"-15" high; spikes 8"'-li" long; spikelets 1'" distant, flower li'" long.— Hab. Jamaica!, 

 tJl coU., Pedro plains, Manchester, S. Elizabeth ; [Cuba !]. 



