PLANTS OF SOUTHERN NEW JERSEY. 177 



jj. Ovate not flattened. Panicum, p. 189 

 ii. Spikelets many flowered. Poa, p. 239 



hh. Spikelets mainly pedicelled on filiform 

 branches. 



i. Spikelets one-flowered, 

 y. Much flattened. 



Homalocenchrus, p. 215 

 jj. Not conspicuously flattened. 



k. Panicle very open and diffuse with 

 long filiform branches; usually 

 equal to J^ or >^ the entire height 

 of the plant, flowers more or less 

 "chaffy," often very small. 

 /. Spikelets with long fluxuous 

 hair-like terminal appendage. 

 Muhlenbergia capillaris, p. 221 

 II. Spikelets v/ithout hair-like tips. 

 m. Plants glabrous. 



». Panicle bluish or gray- 

 ish, erect, spikelets. very 

 minute 1.5-2 mm. bog 

 plants. 



Sporobolus, p. 222 

 nn. Panicle redish or sil- 

 very white. 

 0. Spikelets 5 mm. 

 long, a tuft of 

 hairs at the base 

 of the flower. 

 Calamovilfa, p. 228 

 00. Spikelets 1.5-3 nuii-. 

 no tuft of hair, 

 branches exceed- 

 ingly long and ca- 

 pillary. 



Agrostis, p. 224 

 mm. Plants hairy. 



Panicle green or slightly 

 red, coarse weeds. 

 Panicum capillare, p. 195 

 kk. Panicle with much shorter, stiffer 

 branches, strictly erect, flowers glo- 

 bose or ovate, "seed-like." One 

 glume very short and rudimentary 

 at the base of the spikelet. 

 /. Subterranean straw colored 

 fruits on root-like stems. 



Amphicarpon, p. 188 

 II. No subterranean flowers. 

 12 MUS Panicum,^. 189 



