GRAMINACEAE (GRASS FAMILY) 



i a Spikes about i in. long, protruding from sides of stem 



VIRGINIA BEARD GRASS. (A. virginicus.) 

 b Spikes 1-2 in. long, terminal or lateral 



BROOM BEARD GRASS. (A. scopdrius.) 

 c Spikes 2-5 in. long, terminal and lateral 



FORKED BEARD GRASS. (A. furcdtus.) 



20 ARISTIDA. 



1 a Panicle spreading, not spike-like; awns united at base 



SEA-BEACH ARISTIDA. (A. tuber culbsa.) 

 b Panicle spike-like ; awns not united at base 2 



2 a Panicle 1-3 in. long; awn twisted at base 



POVERTY GRASS. (A. dichotoma.) 

 b Panicle 3-7 in. long; awn not twisted at base 



SLENDER ARISTIDA. (A. grdcilis.) 



21 Hy-STRIX BOTTLE-BRUSH GRASS. (H. hystrix.) 



22 ECHINOCHLOA BARNYARD GRASS. (E. crus-gdlli.) 



23 PASPALUM. 



1 a Stems densely hairy just beneath the spike 



PUBESCENT PASPALUM. (P. pubescens.) 

 b Stems not hairy just beneath the spike 2 



2 a Stems prostrate; spikelets very hairy 



PROSTRATE PASPALUM. (P. prostrdtum.) 

 b Stems erect; spikelets usually not hairy 3 



3 a Spikelets broadly obovate; leaves usually covered with 



fine, short hairs SLENDER PASPALUM. (P. setdceum.) 



b Spikelets oval ; leaves usually covered with long hairs 



MUHLENBERG'S PASPALUM. (P. muhlenbergii.) 



24 SPARTlNA. 



i a Leaves about i in. broad ; spikes 20-50 



SALT REED GRASS. (S. polystdchya.) 

 b Leaves about % in. broad; spikes 5-20 



MARSH GRASS. (S. cynosuroldes.) 

 c Leaves less than V in. broad, infolded ; spikes 2-10 



SALT MEADOW GRASS. (S. patens.) 



25 ELEUSlNE YARD GRASS. (E. indica.) 



26 SYNTHERfSMA. 



i a Stem decumbent at the base; spikes 3-10 



CRAB GRASS. (S. sanguindlis.) 

 b Stem erect; spikes 1-5, very slender 



SLENDER FINGER GRASS. (S. filiformis.) 



27 CAPRlOLA BERMUDA GRASS. (C. ddctylon.) 



28 ORtZA RICE. (O. satlva*) 



29 H6LCUS VELVET GRASS. (H. latidtus.) 



30 DANTH6NIA WILD OAT GRASS. (D. spicdta.) 



31 ZIZANIA WILD RICE. (Z. aqudtica.) 



32 SORGHASTRUM INDIAN GRASS. (S. avendceum.) 



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