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COMPARATIVE ANALYSIS. 



TRIANDRIA. 



Naedus. 



Florets spiked, unilateral . 



TRIANDRIA. 



Monogynia. 



lligynia. 



Stricta. 



Alopecurtjs. 



1. Glumes not united . . . BuTbosux. 

 Glumes united at base . .. . 2 



2. Spike ovate, inflated sheath of upper leaf thriee as long as 



the leaf ..... Alpinus. 



Spike cylindrical, sheath not thrice as long as upper leaf 3 



3. Culm erect, glumes acute ... 4 

 Culm ascending, glumes obtuse . . .5 



4. Spike obtuse, awn twice length of corolla . Pratensis. 

 Spike acute, awn more than twice length of corolla . Agrestis. 



5. Awn as long as the glumes . . . Fuhus. 

 Awn longer than the glumes . . Genicidatus. 



Spike dense, ovate 

 Panicle branched 



Glumes acute 



Phalaeis. 



Ammopmla. 



Canariensis. 

 Arundinacea. 



Arundinacea. 



Phletjm. 



1. Glumes awnless, twice as long as the corolla . Arenarium. 

 Glumes mostly awned, not twice as long as the corolla . 2 



2. Glumes naked or downy (not ciliated) at the back . 3 

 Glumes ciliated at the back . . .4 



3. Culm mostly branched, glumes wedge-shaped . Asperum. 

 Culm simple, glumes lanceolate . . . Bcehmeri. 



4. Glumes lanceolate, gradually tapering . . Michelii. 

 Glumes truncated . . . .5 



5. Spike ovate-oblong, awn as long as the glume . Alpinum. 

 Spike cylindrical, awn shorter than the glume . Pratense. 



Awns long . 

 Florets glabrous 



Laguetjs. 

 Milium. 



GASTBIDrtTM. 



Awn twice as long as the glumes 



Ovatus. 



Effuswm. 



Lendigeram. 



