CLASS III. ORDER III. 31 



^ Subgenus Poltpogon. Calyx and corolla terminating in 

 bristles. 



Agrostis racemosa. Blich. Racemed Bent grass. 



Panicle dense, interrupted ; bristles of the calyx 

 scabrous; corolla awnless, hairy at base; culm 

 branched. 



S>/n. Poltpogon eacemosi's. Nuttall. 



Culm compressed, erect. Leaves erect, rigid. Panicle formed 

 of many conglomerated spikes. — In wet meadows. — August. — 

 Perennial. 



33. CINNA. 

 CiNNA AURUNDiNACEA. L. Rcccly Ciuna. 



Panicle large, capillary, loose ; culm smooth ; 

 leaves broad linear. 

 Syn. Agrostis cinna. Schreb. 



A large rank grass, three or four feet high, resembling some 

 species of Arundo, and differing from most other grasses iu 

 having a solitary stamen in each flower. — Wet shady grounds. — 

 August. — Perennial. 



34. LEERSIA. 

 Leersia oryzoides. Swartz. Cut grass. 



Panicle loose ; spikelets triandrous ; keel of the 

 glumes ciliate. Sw. 

 Syn. Phalap.is oryzoides. L. 



Stem about two feet in height. Leaves exceedingly rough 

 backward, so as to cut the hands if drawn across them ; narrow, 

 on long rough sheaths. Panicle erect, spreading, with slender, 

 rough branches. Flowers very distinguishable by their oval 

 figure and white color. Glumes of the corolla compressed, the 

 two valves shut together, so as to assume an elliptical form, with 

 the curvature on one side greatest. Keel of the valves ciliated, 

 giving the circumference of the flower a fringed appearance. — 

 Wet places. — August. — Perennial. 



