386 



OKDEB 155. GRAMLNE^E. 



3-4' ; spkl. 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. it Rocky hills. 



2 M. diffusa Schr. (d) Decumbent, diffuse, branching, S 18', Ivs. 2 3' ; panicles 



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

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



3 HI. capillaris Kunth. Hair G. Erect, very slender, 1J 3f, simple ; pan. purple, 



large, diffuse, branches 14', as fine as hairs ; pales long-awned. Dry soils. 

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

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



5 M. glomeruta. Trin. Glaucous, erect, pubsimple, 1J 3f, Ivs. 35' ; pan. spike-like, 



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



6 M. MEexica.ua Trin. (a) Culms much branched, ascending 2 3 5f; leaves lance 



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

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

 0. purpurta. Culms wiry, branched only at base ; panicle purple. 111. J. Wolf. 



7 M. sobolifera (Muhl.) {b) Like the last, but the panicles arc more slender, or fili- 



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



8 OT. sylvaliea 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 1". Rocky 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 awn. N. Y. II. B. Lord. 



9 in. Willdenovii Trin. (w) Culm and leaves as in 



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

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

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



9. POLYPOGON, Desf. PoLYroa G. Spkl. 

 1-flwd., densely paniclcd. Glumes subequal, sim- 

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

 near the tip. Stain. 3. Grain free. 



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

 spike-like, 23', 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, it Culms 

 simple, tall, paniculate, from creeping rhizomes. 



CALAMAGROSTIS. No rudiment. Panicle ex- 

 panding, loose. Pales awnless Nos. 1, 2 



DEYEUXIA. .Rudiment a hairy pedicel. Lower 



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

 AMMOPUILA. Rudiment plumous. Panicle 



spike-form. Spikelet 6" No. 10 



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



a Beard nearly equaling the pales. Pan. contracted Nos. 5 7 



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



I C. brcvipllis (Torr.) Slender, 3 4f; leaves broad-linear, flat; pan. purple, with 



