POACEAE 



Spikelets crowded in short dense, stout spikes. 

 2-several perfect flowers in each spikelet. 

 Spikes with terminal spikelets. 

 Spikes with rachis extending beyond the spikelets 

 in a naked point. 



Tribe X. Festuceae 

 Rachilla with hairs longer than flowering scales enveloping 



them. 

 Rachilla and flowering scales glabrous, or if hairy the hairs 

 shorter than the scales. 

 Spikelets of 2 forms, the fertile 1-3-flowered. 

 Spikelets all alike. 



Flowering scales 1-3 nerved, rarely with inter- 

 mediate additional faint ones. 

 Lateral nerves of the flowering scales pilose. 

 Internodes of the rachilla long, the deeply 

 2 lobed flowering scale attached by a 

 long-pointed callus. 

 Internodes of rachilla and callus of flower- 

 ing scale short. 

 Spikelets on pedicels of varying 



length. 

 Spikelets on short pedicels of about 

 the same length. 

 Lateral nerves of the flowering scale glabrous. 

 Second empty scale very dissimilar from 



the first. 

 Second empty scale similar to the first. 

 Panicle narrow, branches appressed. 

 Panicle dull, interrupted; rachilla 



articulated. 

 Panicle shining, dense, spike- 

 like; rachilla continuous. 

 Panicle open, the branches more or 

 less spreading. 

 Flowering scales 5-many-nerved. 



Stigmas placed at or near the apex of the ovary. 

 Scales more or less strongly compressed 

 and keeled. 

 Empty basal scales 3-6; spikelets flat, 



2-edged. 

 Empty basal scales 2; spikelets some- 

 what flattened. 

 Spikelets unisexual; plant dioe- 

 cious. 

 Spikelets perfect. 



Spikelets arranged in 1 -sided 

 dense capitate clusters; 

 flowering scales awned. 



95 



52. Atheropogon. 



53. Eleusine. 



54. Dactyloctenium. 



55. Phragmites. 

 67. Cynosurus. 



57. Triplasis. 



56. Tridens. 



58. Diplachne. 



61. Sphenopholis. 



59. Aira. 



62. Koeleria. 



60. Eragrostis. 



63. Uniola. 



64. DlSTICHLIS. 



66. Dactylis. 



