CLXIIL GRAMINE^, 
189 
V. Avene^. Slender grasses. Spikclets panicicd. Florets 2 to many. 
Glumes thin scarious; rachilla not produced beyond glume IV. Glumes 
III and IV awned, stiffer than I and II. 
Panicles lax of few spikelets medium or small . 51. Eriachne 
VI. Arundine^e. Tall stout reeds with large panicles. Florets 2 or 
many, enveloped in long hairs from the callus or back of glumes. 
Glumes membranous awnless. 
Rachilla with silky hairs .... 52. Phragmites 
G lumes hairy on the back, rachilla glabrous . 53. Thysanol/ENA 
VII. Agroste^. Slender grasses. Inflorescence panicled or spiciforra. 
Floret I. Awn, if present, from the back of the glume. 
Leaves ovate; spikelets minute in a dense 
brush-like head; no awns . 54. Sph.erocaryum 
L eaves linear; spikelets elongate in a strict 
spike, awned .... 55. Garnotia 
VIII. SxiPE.E. Slender grasses; rachilla not continuous before the 
floret. Floret i. Glume IV hardened when mature enveloping the fruit. 
Awns from tip 3 (or i with three branches). Ligule a ring of hairs. 
56. Aristida 
IX. Zoysie.e. Spikelets in spiciform panicles or racemes. Ripe spike¬ 
lets falling entire. F'loret i. 
Glumes awnless; raceme slender . . . 57. Zoysia 
Glumes awned; awns long; panicle spiciform . 58. Perotis 
X. SporobolE/E. Slender panicled or .spiciform panicled grasses. All 
glumes similar. Floret i. No awns. Seed loose in the pericarp. 
Only genus . . .... 59. Sporobolus 
XL Eragrostide.e. Slender gra.sses. Spikclets panicled, flat. Florets 
numerous, exserted from the glumes. Glumes distichous. 
Grass 6 to 10 ft. tall; panicle dense; spikclets 
•5 in. long, awned . . .60. Myriostachya 
Grasses i ft. tall. 
Panicles lax; spikelets rather long pcdicelled, 
I to 2 in. long, not awned . 61. Eragrostis 
P anicles strict, branches simple; spikelets 
nearly sessile, narrow . .62. Leptochloa 
XII. Chloride.-e. Spikelets sessile or sub-sessile in 2-ranked, secund 
usually very dense spikes, rarely pcdicelled and panicicd [Triraphis). Spikes 
solitary or digitate. Glumes membranous to chartaceous; awns when present 
straight and fine. 
Spikes of spikelets racemed . . . .63. Dinebra 
Spikes digitate. 
Spikes slender, unawned spreading . .64. Cynodon 
Spikes thick, fascicled awned . . .65. Chloris 
Spikes digitate; glumes stiff mucronate. 
Spikes ending in a spikelct; glumes shortly 
mucronate . . . .66. Eleusine 
Spikes ending in a sharp point; glumes 
strongly mucronate . . 67. Dactyloctenium 
Spikelets silky panicled; tall reed-like grass 68. Triraphis 
XIII. Oryze.e. Slender swamp-grasses; spikelets panicled, all alike, 
compressed. Fertile floret i, awnless or caudate-aristate. Glumes I and II 
minute or absent. Glume III oblong hard. Stamens 6. 
Lower florets represented by 2 scales or bristles 69. Oryza 
L ower florets quite suppressed . . .70. Leersia 
