Obdeb 156.— GRAMINEJE. 7 77 



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

 lower paleae mucronate. — it Bog meadows, also on rocky mountains, N. Eng. to 

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

 2 M. Mesricana Trin. Culm erect or ascending, with swelling nodes, much 

 branched and leafy above, often nearly leafless below, 1 \ — 3f high ; Ivs. lanceolate, 

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

 spike-clusttred, dense-flowered and purple-spotted, lateral ones partly enclosed iti 

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

 cent pales. — U Wet shades, X. Eng. to Wise, common. Aug. (Agrostis L.) 



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

 18 — 30' high; branches erect and filiform; nodes not sioeUing ; lvs. linear-lanceo- 

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

 rather crowded spikelets; paleas equal, longer than the acute glumes. — U Rocky 

 hills, K Eng. to III and S. States, frequent. Aug. (Agrostis Muhl.) 



4 M. sylvatica Torr. & Gr. Culm ascending, 2 — ?>f long, much branched, diffuse, 

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

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

 minate, a little slwrter than the paleas; awns several times longer than the spike- 

 let.— U Rocky shades, N, Y. to 111., N. J., Penn- Sept. (Agrostis Torr.) 



5 M. Willclendwii Trim Culm erect, subsimple, pubescent at the nodes, with 

 a few appressed branches; lvs. 6 — 9' by 2 — 3 ', lanceolate, veined, scabrous, 

 spreading, with pubescent sheaths; panicle contracted, very slender and long, 

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

 paleoz; awn 3 — 1 times the length of the spikelet. — % Rocky woods, Can. and 

 U. S. July, August. (Agr. tenuiflora Willd.) 



■6 M. diffusa Schreb. Culm decumbent, diffuse, branching, slender, compressed; 

 branches assurgent; lvs. 2 — 3' by 2", linear-lanceolate, rough, with 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 palea?; glumes extremely minute. — 2£ Borders of .woods and shady fields, 

 N. Eng to Car. and Ky. Aug. 



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

 high; lvs. lanceolate, scabrous, ciliate on tho margin, 4 — 6' long, 3'' or more 

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

 tracted; spikelets 6" (16" including the awn) long, pedicellate; glumes minute, the 

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

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

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



S M. capillaris Kunth. Casspitous ; culms erect, very slender and smooth, 18 — 

 24' high; lvs erect, becoming filiform towards the end. 1 — Hf long; panicle 

 diffuse, with the branches 1 — 4 long, in pairs, and as fine as hairs; spikelets 

 purple; lower paleae produced into an awn 3 or 4 times its length. — U 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., JL (Tri- 

 chochloa DC.) 



8. POLYPOGON, Desf. Polypog Grass. (Gr. -rroXvg, many, Trwywv, 

 beard.) Spikelets 1-flowered, densely panicled ; gls. 2, subequal, thin, 

 •oarinate, both similarly awned, much, longer than the flower; pales 

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

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



P. Mcmspeliensis Desf Culm simple, decumbent below, If or more high; lvs. 

 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 a little longer. — Fields, coast- 

 ward, N. Eng. ? common South § Eur. 



9. CALAMAGROSTIS, Adans. (Name compounded of Calamus and 

 Agrostis.) Spikelets 1-flowered ; glumes 2, subequal, acute or acumi- 



