52 Mr. Woods on the Genera of European Grasses. 



4. Jndropogon. Spiculee linear, lanceolate. Seeds nearly linear. 



In the European species of this genus, except in A. Gryllus and A. Allionii, 

 the spiculœ are in fingered spikes. 



2. Spiculœ all fertile, in two rows, on one side of a flattened rachis. 



6. Digituria. Spikes fingered. Spiculse unarmed. 



7. Oplismemis. Spikes racemose, or panicled. Spiculee naked. Glumes 



keeled, pointed, or setigerous. 



3. Spiculœ all fertile, in a compound spike tiled all round. 



8. Setaria. Spiculœ accompanied by setiform bracteœ. 



9. Pennisetum. Inner bracteœ feathery. 



4. Spiculœ all fertile, disposed in sets, one sessile, and one or two 

 stalked, enveloped in long silky hairs. 



1. Saccharum. Awnless. Squamulœ 2. Inner palea minute, or wanting. 



Panicle not spike-like. 

 3. Erianthus. Lower palea of the fertile floret awned. Squamulœ 2. Sta- 

 mens 2 or 3. Panicle spreading. 



2. Iniperata. Awnless. Squamulœ 0. Panicle spike-like. 



5. Spiculœ all fertile, scattered, not enveloped in hairs. 



14. Pliahiris. Additional scales short, unarmed. Glumes navicular, keeled, 

 inclosing. Paleœ coriaceous. 



15. Anthoxanthum. Additional scales large, inclosing the scariose paleœ, 

 awned. Glumes inclosing. 



10. Panivum. Additional scale large, glume-like, embracing the horny ril)- 

 less paleœ. Glumes not inclosing. 



E. Spiculœ 1 or more flowered, without additional external scales, 

 sessile, or nearly so, in two rows on one side of a flattened 

 rachis. 



In this, and all the following divisions, all the spiculœ are perfect, except in 

 Lappago, where the uppermost of each short spike are barren, or neuter and ta- 

 bescent, and Cynosurus, where the barren spiculœ form a sort of involucrum. 



