MONOCOTYLEDONOUS OR ENDOGENOUS PLANTS. G21 



branches, alike, one pediceled, the other sessile, both witli 

 a hairy involucre at tiie base; loiver flower ot' one palea, 

 neutral ; the upper of two paleae, perfect, shorter than the 

 membranaceous nearly equal glumes, the lower one awned ; 

 stamens 2-3. 



E. ALOPECUROIDES, Ell. Culms 4°-10° high; sheaths oi 

 the broad (6"-12") very rough leaves woolly above, rough 

 below ; panicle (l°-2° long) woolly, expanding, pyrami- 

 dal; hairs of the involucre copious, twice as long as the 

 sparsely hairy glumes ; awit straight. 



SORGHUM, Pers. 



Spikelets 2-3 together on the slender branches of the 

 loose panicle, the lateral ones sterile or a mere pedicel, the 

 middle or terminal one fertile; glumes coriaceous or indu- 

 rated, closely bearded, sometimes awnless. Otherwise like 

 Andropogon. 



S. AVENACEUM. Pamcle eYQct; (7^.f???es yellowish, lance- 

 olate, the lower one hairy ; one palea to each flower, linear, 

 ciliate; aion rough, slender, twice as long as the glumes; 

 sterile floivers reduced to one or two slender hairy pedicels. 

 (Andropogon avenaceus, Mich.; A. ciliatus. Ell.) Dry 

 sandy soil. September. Culms (2°-4° higli) and leaves 

 smooth ; panicle oblong, 6-12' long. Perennial. 



S. NUTANS, Gray. Panicle long and narrow, nodding; 

 glumes dark brown, the upper sparingly, the lower densely 

 hairy ; palecB of the upper flower 2, unequal ; aivn 4 times 

 the length of the glumes, bent in the middle, rough above, 

 twisted and hairy below; sterile spihelets mostly rudi- 

 ments. (A. nutans, L.) Dry barren soil. September. 

 Culms 2°-4° high ; panicle l°-2° long. Perennial. 



MONANTHOCHLOE, Engelm. 



A loiD maritime branching grass, with very short rigid 

 crowded leaves, and dioecious flowers in solitary terminal 



