GRAMINACEAE (GRASS FAMILY) 



81 a Panicle appears airy, much branched; spikelets com- 



paratively fine; leaves comparatively narrow; plants 



slender 51. Agrostis. p 121 



b Plants not completely as in a 82 



82 a Leaves narrow, less than V in. broad ; spikelets 2-6- 



flowered, tapering; a tuft of small hairs at base of 



inner scale 55. Poa. p 122 



b Leaves usually more than % in. broad; spikelets i- 



flowered 83 



83 a Spikelets usually ovate, when tapering not more than 



twice as long as broad 52. Panicum. p 121 



b Spikelets tapering, more than twice as long as broad, 

 often somewhat velvety; leaves sometimes striped 

 with white 54. Phalaris. p 122 



1 CORTADfcRIA PAMPASS GRASS. (C. argentea*) 



2 MISCANTHUS ZEBRA GRASS. (M. sinensis*) 



3 ERIANTHUS PLUME GRASS. (E. ravennae*) 



4 ARUNDINARIA JAPANESE BAMBOO. (A. japonica*) 



5 ARtJNDO GIANT REED. (A. dbnax.*) 



6 ZfeA CORN. (Z. mays*) 



7 SECALE RYE. (S. cereale*) 



8 TRfTICUM WHEAT. (T. sativum*) 



9 H6RDEUM BARLEY. (H. sativum*) 



10 CHAET6CHLOA. 



i a Bristles on spike yellowish-brown 



PIGEON GRASS. (C. glauca.) 

 b Bristles on spike green or yellow 



GREEN FOXTAIL GRASS. (C. viridis.) 

 c Bristles on spike purplish. .ITALIAN MILLET. (C. itdlica*) 



11 LYMUS. 



i a Glumes lanceolate; awns on flowering scale Vi-Vz in. 



long VIRGINIA WILD RYE. (E. virginicus.) 



b Glumes awl-shaped; awns on flowering scale Vz-2 in. 



long SLENDER WILD RYE. (E. striatus.) 



12 ALOPECURUS MARSH FOXTAIL. (A. geniculatus.) 



13 PHLfeUM TIMOTHY. (P. pratense.) 



14 ATHEROP6GON. . .RACEMED BOUTELONA. (A. curtipendulus.) 



15 CfiNCHRUS BURGRASS. (C. tribuloldes.) 



16 TRIPSACUM GAMA GRASS. (T. dactyloides.) 



17 AGROPtRON QUITCH GRASS. (A. repens.) 



18 L6LIUM. 



i a Spikelets with awns. .. .ITALIAN RYE GRASS. (L. itdlicum.) 

 b Spikelets not with awns RAY GRASS. (L. perenne.) 



19 ANDROP6GON. 



itt 



