386 



ORDER loo. GRAMINE^E. 



3-4' ; f pkl. large, few ; lower pale 6" (1218" with its awn). 5-veined ; u;jper pale t 

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



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



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

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



3 M. capilla,ris 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 HI. trichopodes (Ell.) Panicle erect, oblong, not diffuse, green ; lower pale tip- 



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



5 M. glomera.ta Trin. Glaucous, erect, stibsimple, It 3f, Ivs. 35' ; pan. spike-like, 



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



6 IW. Ulexiciiiia Trin. (a) Culms much branched, ascending 2 3 5f; leaves lance 



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

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

 /3. purpurea. Culms wiry, branched only at base ; panicle purple. 111. J. Wolf. 



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



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



8 OT. sylvalica T. & G. (s) Culms ascending, branched, diffuse, 2-3f; pan. slen- 



der, rather dense ; glumes subequal, scarce shorter than 



the lower pale (1"), whose awn is 2 i". Rocky shades, 



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

 ft. ? tnlpina. Very glaucous ; pan. very dense, raceme- 

 like ; glumes abruptly short-awned : pale about as 

 long as its awn. N. Y. //. B. Lord. 



9 1M. \Villdeiiovii 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 louir as the spikelet. Rocky woods : com. 



9. FOLYFOGON, Desf. POLYPOO G. Spkl. 

 1-flwd., densely panic-led. Glumes subequal, sim- 

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

 near the tip. Stam. 3. Grain tree. 



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

 spike-like, 23'. pale ; gl. (fi) 1", their awns 2". N. England, and S. 



10. CALAM AGROSTIS, Aclana. 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. 



CAI.AMAGIIOSTIS. No rudiment. Panicle ex- 

 panding, loose. Pales awnless Nos. 1, 2 



DETEUXIA. Rudiment a hairy pedicel. Lower 



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

 AJIMUPHILA. 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 7 



a Beard much shorter than the pales. Awn from near the base Nos. B, Ti 



I C'. brcvipilis <Torr.) Slender, 3 4f; leaves broad-linear, flat; pan. purple, with 



