386 



ORDER 155. GRAMINE^E. 



34' ; epkl. large, few ; lower pale 6" (1218" with its awn). 5-veined ; n;jper pale, 

 with an abortive pedicel in the groove of its back ; sta. 2. U Rocky hills. 

 1 OT. diffusa Schr. (d) Decumbent, diffuse, branching, 818', Ivs. 23' ; panicles 

 very slender, terminal and lateral ; spikelets 2" (4" with its awn), white with green 

 spots; glumes (g) extremely minute, white. Shady places: frequent. 



3 M. capillarls Kunth. Hair G. Erect, very slender, Ij 3f, simple ; pan. purple, 



large, diffuse, branches 1 4', as fine as hairs ; pales long-awned. Dry soils. 



4 M. trichopodes (Ell.) Panicle erect, oblong, not diffuse, green ; lower pale tip- 



ped with a short awn. Culms 3f, leaves flat. Pine barrens, 8. (Agrostis, Ell.) 

 it ITI. glomerata. Trin. Glaucous, erect, snbsimple, H 3f, Ivs. 35' ; pan. spike-like, 



dense, interrupted, 2 3'; glumes 2", pales 1". Bogs, northward. 

 G M. jHexicAiia Trin. (a) Culms much branched, ascending 2 3 5f; leaves lance 



linear; pan. many, the lateral half-sheathed, dense, and narrow; glumes and pales 



* nbequal (1") or one glume longer. Damp shades : common. 

 jS. purpvrea. Culms wiry, branched only at base ; panicle purple. 111. J. Wolf. 



7 m. sobolifera (Muhl.) (6) Like the last, but the panicles are more slender, or fili- 



form, and the glumes shorter than the pales. Hardly distinct. Woods. 



8 M. sylvatiea T. & G. () Culms ascending, branched, diffuse, 2 3f ; pan. slen- 



der, rather dense ; glumes subequal, scarce shorter than 



the lower pale (1"), whose awn is 2 4". Uocky shades, 



N. England to N. J., and W. (Agrostis, Muhl.) 

 |3. ? tvlpina. Very glaucous ; pan. very dense, raceme- 

 like ; glumes abruptly short-awned : pale about as 

 long as its arvn. N. Y. H. B. Lord 



9 Itt. Wllldeiiovll Trin. (w) Culm and leaves as in 



the last; pan. very slender, loose-flowered; glume 

 bristle-pointed, J shorter than the pale, whose awn is 

 3 4 times as long as the spikelet. Rocky woods : com. 



9. POLYPOGON, Desf. POLYPOG G. Spkl. 

 i-flwd., densely panicled. Glumes subequal, sim- 

 ilarly awned, much longer than the flower (c). Lower pale usually awned 

 near the tip. Stain. 3. Grain free. 



P. Monspelieiisis Desf. (a) Culm simple, If or more; Ivs. lance-linear, 2 5'; pan 



spike-like, 2 3', pale ; gl. (b) 1", their awns 2". N. England, and S. 



10. CALAMAGROSTIS, Adans. Spkl. 1- 

 flwd. Glumes subequal, acute or pointed. Pales 

 bearded at the base, lower one mucronate, mostly 

 awned below the tip, upper often with an abor- 

 tive rudiment of a second flower, if Culms 

 simple, tall, paniculate, from creeping rhizomes. 



CAi,AMAOR6sTis. No rudiment. Panicle ex- 

 panding, loose. Pales awnless Nos. 1, 2 



DETEUXIA. Rudiment a hairy pedicel. Lower 



pale awned. Spikelet 23" ... (a) 

 AM6PHILA. Rudiment plumous. Panicle 



spike-form. Spikelet 6" No. 10 



i Beard nearly equaling the pales. Panicle rather open Nos. 3, 4 



a Beard nearly equaling the pales. Pan. contracted Nos. 5 1 



a Board much shorter than the pales. Awn from near the base Nos. 8, S 



I . bre vi pills (Torr.) Slender, 3 4f; leaves broad-linear, flat; pan. purple, with 



