1 20 Graminea. 



Spikelets 1- or sub 2-seriate, distant in long 

 slender racemed or panicled spikes. 



Spikelets i-fld., glume III awned . . 60. DichjETAria. 

 Spikelets i-many-fld., not awned . . 61. Leptochloa. 

 Spikelets in turbinate subsessile secund fascicles 

 which are articulate on the rhachis of a 

 slender terminal spike . . . .62. Gracilea. 



Tribe XII. Festueeae. — Infl. various, mostly panicled ; spikelets usually 

 pedicelled, 3- or more rarely 2-fid., rhachilla articulate at the base, 

 produced between the fig. glumes, and often beyond them bearing 

 empty glumes, awn, if present, not twisted, glumes I and II per- 

 sistent (except in Lophatherum). 



Subtribe 1. PAPPOPHORE.E.— Spikelets spicate, fig. glumes many- 

 awned or deeply lobed, many-veined. 

 Fig. glumes flabelliform, deeply 3-4-lobed . 63. Pommereulla. 



Subtribe 2. ARUNDINE^E. — Spikelets panicled, many-fid., glumes 

 narrow, all 3-veined, fig. enveloped in very long hairs. 

 Glumes all hyaline, hairs from the callus . . 64. Phragmites. 



Subtribe 3. SESLERIEyE. — Spikelets very minute, crowded in globose 

 clusters, forming interrupted spiciform panicles, mixed with the 

 empty glumes of imperfect spikelets . . 65. Elytrophortjs. 



Subtribe 4. ERAGROSTEjE. — Infl. various ; spikelets many-fld., glumes 

 I and II 1-5-veined, much shorter than the rest of the spikelet, 

 flg. glumes 3-veined. 

 Fig. glumes entire. 



Glumes I and II awned 66. Myriostachya. 



Glumes not awned. 



Glume II 3-veined 67. Eragrostis. 



Glume II 5 -veined 68. Halopyrum. 



Fig. glumes 2-toothed 69. Diplachne. 



Subtribe 5. CENTOTHECE^E. — Spikelets i-more-fld., 1-2-seriate, 

 secund, spicate, or on the spiciform branches of a large open 

 panicle ; empty glumes 3-7-veined, flg. 3-9-veined ; leaves tessellately 

 veined. 

 Spikelets awned. 



Spikelets 1-1 \ in., stigmas very long, contorted 70. Streptogyne. 

 Spikelets \-\ in., stigmas free . . .71. Lophatherum. 

 Spikelets \-\ in., not awned . . . .72. Centotheca. 



Subtribe 6. EUFESTUCE^E. — Spikelets spicate or panicled, glume I 

 1-3-veined, II 5-7-veined. 

 Spikelets shortly spicate, spikes capitate, flg. 



glumes 7-9-veined 7^. /Eleuropus. 



Spikelets panicled 74. Poa. 



Spikelets distant, on a long, slender rhachis . 75. Brachypodium. 



1 1. Spikelets spicate, secund, inserted in notches or pits of a simple 

 rhachis (see Oropetium in Chloridetz). 



Tribe XIII. Hordeaceee. 



Spike cylindric, articulate 76. Lepturus. 



B. Perennially leafy shrubs or trees. 



Tribe XIV. Bambuseee. — Spikelets few- or many-fld., all alike in 

 form, bisexual, inarticulate at the base, pedicels often bearing empty 



