538 GRAMINE.E. 



Steud.— Spikes numerous, H"-4" long.— Hab. Antigua!, Wulhchl. ; Trinidad!, Cr.; 

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



4y. L. virg-ata, P. B. Spikelets 6-3-flowered ; sterile glumes acuminate, fertile 

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

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



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

 the superior. 



0. gracilis, Ns. Spikes l£"-2£" long j inferior awns as long as the flower, superior 

 shorter or none. 



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

 the flower. 



Hab. Jamaica !, all coll. (a, j8), in pastures ; Antigua !, Wullschl. (a, 7), Dominica !, 

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



50. Li. longa, Gr. (n. sp.). Spikelets 3-4-flqwered ; sterile glumes acuminate, fertile, 

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

 bearded 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"'bioad : ligule reduced; panicle 1' long: 

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

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

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



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. filiformis, Gr. (». sp.). Root fibrous ; spikes long, filiform, flowering to the 

 base: inferior spikelets gradually more distant and imperfect ; rhachis and flowers glabrous 

 (except a few hairs at the margin) : fertile 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 caspitose, aphyllous at the base : habit of 67. lavis, 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, 

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

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

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



27. CHLORIS, Sw. 



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

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

 less. Stigmas projecting at or above the middle of the flower. Embryo 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"'-H" long; spikelets 1'" distant, flower li'" long.— Hab. Jamaica!, 

 all coll., Pedro jplains, Manchester, S. Elizabeth; [Cuba!]. 



