GRAM1NACEAE (GRASS FAMILY) 



33 AVfeNA OAT. (A. satlva*) 



34 ORYZ6PSIS MOUNTAIN RICE. (O. asperifblia.) 



35 ARRHENATHfcRUM OAT GRASS. (A. elathu.) 



36 FESTtTCA. 



i a Conspicuous awns present; leaves 1-3 in. long 



SLENDER FESCUE GRASS. (F. octoflbra.) 

 b No awns present; leaves 4-15 in. long 



TALL FESCUE GRASS. (F. elatior.) 



37 BR&MUS. 



1 a Awns about % in. long 



DOWNY BROOM GRASS. (B. tectbrum.) 

 b Awns less than % in. long 2 



2 a Sheaths of leaves not hairy ; awns about % in. long 



CHESS. (B. secallnus.) 

 b Sheaths of leaves hairy ; awns about V in. long 3 



3 a Spikelets hairy; plant 2-4 ft. high 



WOOD CHESS. (B. ciliatus.) 

 b Spikelets not hairy; plant 1-3 ft. high 



UPRIGHT CHESS. (B. racemosus.) 



38 ANTHOXANTHUM.. SWEET VERNAL GRASS. (A. odoratum.) 



39 DACTYLIS ORCHARD GRASS. (D. glomerata.) 



40 CALAMAGR6STIS BLUE-JOINT GRASS. (C. canadensis.) 



41 DESCHAMPSIA WAVY HAIR GRASS. (D. flexubsa.) 



42 CfNNA WOOD REED GRASS. (C. arundinacea.) 



43 MUHLENB6RGIA. 



1 a Branches of panicle 4-9 in. long, hair-like; awns % 



in. or more long HAIR GRASS. (M. capillaris.) 



b Branches of panicle 3 in. or less long 2 



2 a Panicle with branches Vz in. or more long, densely 



flowered MEADOW MUHLENBERGIA. (M. mexicana.) 



b Panicle spike-like, not completely as in a 3 



3 a Panicle densely flowered, 1-3 in. long 



MARSH MUHLENBERGIA. (M. racembsa.) 

 b Panicle loosely flowered, 3-6 in. long 



ROCK MUHLENBERGIA. (M. sobolifera.) 



44 SPOR6BOLUS RUSH GRASS. (S. longifblius.) 



45 DISTf CHLIS MARSH SPIKE GRASS. (D. spictlta.) 



46 PHRAGMlTES REED. (P. phragmltes.) 



47 HOMALOCfiNCHRUS WHITE GRASS. (H. virginicus.) 



48 ERAGR6STIS. 



1 a Spikelets V^-Vz in long, oblong, io-35-flowered 



STINK GRASS. (E. major.) 

 b Spikelets about ^4 in. long, linear, 5-i5-flowered 2 



2 a Sheaths overlapping; panicle somewhat included in the 



upper sheath PURPLE ERAGROSTIS. (E. pectinacea.) 



b Sheaths not overlapping; panicle not included in the 



upper sheath TUFTED ERAGROSTIS. (E. pilbsa.) 



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