230) COMPARATIVE ANALYSIS. 
TRIANDRIA. Monogynia. 
Narovs. 
Florets spiked, unilateral . ; , : Stricta. 
TRIANDRIA. Digynia. 
ALOPECURUS. 
1. Glumes not united : : é Bulbosus. 
Glumes united at base. : 2 
2. Spike ovate, inflated sheath of upper leaf thre as long as 
the leaf . : : Alpinus. 
Spike cylindrical, sheath not iene as iste 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 . : E Fulvus. 
Awn longer than the glumes ; ; Geniculatus. 
PuHALakis. 
Spike dense, ovate . f : : Canariensis. 
Panicle branched - é : . Arundinacea. 
AMMOPHILA. 
Glumes acute ; ; : : Arundinacea. 
PHLEUM. 
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 2 ‘ > ae 
8. Culm mostly branched, glumes wedge-shaped ; Asperum. 
Culm simple, glumes lanceolate : : Behmeri. 
4. Glumes lanceolate, gradually tapering 4 : Michelir. 
Glumes truncated . : : : 5 
5. Spike ovate-oblong, awn as long as the glume é Alpinum. 
Spike cylindrical, awn shorter than the glume. . Pratense. 
Lagunrvs. 
Awns long ‘ : : : . Ovatus. 
Mirrem. 
Florets glabrous ; : : : Effusum. 
GaASTRIDIUM. 
Awn twice as long as the glumes . * .  Lendigerum. 
