OKDEB 156. GRAMINEJJ. 777 



terruptea, 2 3' long, many-flowered ; glumes linear, ^ tho length of their awns ; 

 lower palese mucronate. if Bog meadows, also on rocky mountains, N. Eng, to 

 Mo. Aug., Sept. (Polypogon racemosus Nutt) 



2 M. Mexicana Triu. Culm erect or ascending, with eweUing nodes, much 

 branclied and leafy above, often nearly leafless below, 1 J 31' high ; Ivs. lanceolate, 

 scabrous, with half-clasping sheaths; panicles numerous, terminal and lateral, 

 spike-clustered, dense-flowered and purple-spotted, lateral ones partly enclosed in 

 the sheath ; glumes narrow acuminate, mostly shorter than the subequal, pubes- 

 cent pales. 1C Wet shades, N. Eng. to Wise., common. Aug. (Agrostis L.) 



3 M. sobolffera Gray. Culm erect, slender, producing shoots at base, branched, 

 18 30' high; branches erect and liliform; nodes not swelling ; Ivs. linear-lanceo- 

 late, with open sheaths ; panicle simple, filiform, with appresscd branches, and 

 rather crowded spikelets ; paleas equal, longer than tho acute glume?. If Rocky 

 hills, N. Eng. to 111. and S. States, frequent. Aug. (Agrostis Muhl.) 



4 M. sylvatica Torr. & Gr. Culm ascending, 2- 3f long, much branched, diffuse, 

 smooth, with swelling nodes ; Ivs. lanceolate, scabrous, veined, 4 6' long, with 

 smooth, open sheaths ; panicles slender, rather dense ; glumes nearly equal, acu- 

 minate, a little shorter than the palece; awns several times longer than the spike- 

 let If Rocky shades, 1ST. Y. to 111., N. J., Penn. Sept. (Agrostis Torr.) 



5 M. Willdenowii Trin. Culm erect, subsimple, pubescent at the nodes, with 

 a few appressed branches; Ivs. 6 9' by 23', lanceolate, veined, scabrous. 

 spreading, with pubescent sheaths ; panicle contracted, very sl.nder and long, 

 with remote, filiform branches ; glumes subequal, acuminate, half as long as the 

 palece; awn 34 times tho length of the spikelct.' 11 Rocky woods, Can. and 

 Q. S. July, August. (Agr. tonuiflora Willd.) 



6 M. diffusa Schreb. Culm decumbent, diffuse, I ranching, slender, compressed; 

 branches assurgent; Ivs. 2 3' by 2", linear-lanceolate, rough, witli smooth, 

 striate, open sheaths; panicles terminal and lateral, with remote, appressed, 

 rough branches; spikelets 2" long, pedicellate, often purple; awn about as long 

 as the paleas; glumes extremely minute, 1\ Borders of woods and shady lie-Ids, 

 N. Eng. to Car. and Ky. Aug. 



7 M. aristata Pers. Culm erect, simple, retrorsely pubescent at the nodes, 2 3f 

 high ; Ivs. lanceolate, scabrous, ciliate on tho margin, 4 G' long, 3'' or more 

 wide, with somewhat open sheaths; panicle terminal, simple, racemous, con- 

 tracted; spikekte 6" (16" including the awn) long, pedicellate; glumes minute, tin: 

 lower obsolete ; lower paleas half as long as its awn, upper palese with a short 

 awn (abortive pedicel) at base lodged in the dorsal groove. 2f Rocky hills, Can. 

 and U. S., frequent July. (Brachyelytrum Beauv. M. erecta Roth.) 



8 M. capillaris Kunth. Ca3spitous; culms erect, very slender and smooth, 18 

 24' high; Ivs erect, becoming filiform towards the end. 1 lif long; panicle- 

 diffuse, with the branches 1 4' long, in pairs, and as fine as'hairs; ppikelets 

 purple; lower pales produced into an awn 3 or 4 times its length. If Sandy 

 soils, N. Eng. to Ga. and Ky. An exceedingly delicate grass, with large, purple, 

 glossy and almost gossamer-like panicles, waving in the breeze. Jn., JI. (Tri- 

 c-hochloa DC.) 



8. POLYPO'GON, Desf. POLYPOO GRASS. (Gr. rroAi;^, many, Trwyajr, 

 beard.) Spikelets 1-flowercd, densely paniclcd ; gls. 2, subequal, thin, 

 carinate, both similarly awncd, much longer than the flower ; pales 

 thin, the lower usually awned near the tip, upper bicarinatc ; grain free, 

 oval, smooth. Leaves flat. Panicle spike-like. 



P. Monspeliensis Desf. Culm simple, decumbent below, If or moro high; Ivs. 

 lance-linear, much shorter (2 to 5 by 2 to 3''), acute-pointed, minutely downy ; 

 panicle much-branched, spicate-lobed, 2 to 3', the branches very short and dense- 

 flowered, pale ; gls. hispidulous, 1" long, the awns n, little longer. Fields, coast- 

 ward, N. Eug. 1 common South. Eur. 



9. CALAMAGROS'TIS, Adans. (Name compounded of Calamus and 

 Agrostis.} Spikelets 1-flowcred ; glntncs 2, subeqnal, acute or acuini* 



