6$ THE GRASSES 



is in panicles or spikes. If the former, refer to 27 of the 

 left hand column. If the latter, in spikes, refer to 39, 

 and then see whether the spikelets are two-rowed, or one- 

 sided. If the latter, refer to 45, and see whether the 

 spikes are digitate and the spikelets in two rows. ' If they 

 are, refer it to the genus Eleusine. 



For convenience of reference a glossary is attached to this 

 work. 



ANALYTICAL TABLE. 



1 Spikelet with but one flower 2 



1 Spikelet with two or more flowers 26 



2 Flowers arranged in panicles 3 



2 Flowers in spikes 16 



3 With awns or beards 4 



3 Without awns or beards 12 



4 Glumes large 5 



4 Glumes minute, unequal, one hardly seen 11 



4 Glumes none, grass aquatic 2 Zizania 



g Without abortive rudiments 6 



5 With an abortive rudiment of a second flower 52 Holcus 



6 Paleae two 7 



6 Palese three, upper awned, flowers polygamus 66 Sorghum 



7 Paleae, with one awn 8 



7 Lower paleae with three twisted awns 15 Aristida 



8 Palese cartilaginous or gristly 9 



8 Palese herbaceous 10 



8 Palese membranaceous, panicle open 7 Agrostis 



8 Palese membranaceous, panicle contracted 8 Polypogon 



9 Flowers sessile or joined to stem at base 13 Oryzopsis 



9 Flowers stipitate, fruit black 14 Stipa 



10 Flowers naked, with one stamen 9 Cinna 



10 Flowers hairy, stamens three 12 Calamagrostis 



11 Stamens three 10 Muhlenbergia 



11 Stamens two 11 Brachyelytrum 



12 Glumes two 13 



12 Glumes none, leaves rough from the end backwards 1 Leersia 



13 Palese membranaceous 14 



13 Palese leathery, spikelets all cauline 56 Millium 



13 Palese leathery, fertile spikelet radical 67 Amphicarpon 



14 Fruit coated or covered with a husk 15 



14 Fruit naked 6 Sporobolus 



