Trs Obdeb 156.— GEAMINB^. 



slender, 3 — 6' long, whoUy inclosed in the terminal swelling sheath; glumes une- 

 qual, very white, mudi shorter than the white, subequal, obtuse paJea; grain oval, 

 J as long (J") as the pales. — W. ST. Y. (Mr. R. S. Brown) and southwestward. 

 After the sheath falls away the mature fls. turn brownish. (Agrost. longi£ 

 Torr. ?) 



8 S. Indicus Brown. Culm erect, terete, glabrous, 2 — 3f high; Ivs. involute, 

 tapering to filiform; sheath beardlessat throat; joints blaclrish; panicle long {li), 

 slender, open, composed of short, erect, attemate spike-like racemes ; glumes 2, un- 

 equal, mucli shorter than the subequal pales; grain darlc resin-colored, oblong 

 J as long as pales. — Pastures and waste grounds, S. States. (A. Indica L.) § "W. 

 ■Indies. 



9 S. comprSssus Torr. Glabrous; cutm, erect, much compressed, simple, leafy, 

 branched at base, 1 — 2f high ; Ivs. narrowly linear, scarcely shorter than the 

 stem ;■ keel prolonged into the open sheath ; stip. very short ; panicle purple, sub- 

 simple, contracted, the branches few and erect; glumes equal, acute, shorter than 

 the palese, the upper emarginate, rarely muoronate ; paleas ovate, obtuse,, smooth, 

 sometimes deeply cleft ; stig. purple. — Sandy swamps, N. J. Sept. 



10 S. serdtinus Torr. Culm 12 — 18' high, filiform, compressed, growing in 

 patches, smooth, often viviparous at the nodes; Ivs. 2 — 3' by -J", keeled, smooth; 

 sheaths open; stip. ovate, short; panicle 3 — 10' long, capillary, diffuse, branches 

 flexuous, alternate; spikelets elliptical, scarcely i" long; glume ovate, 1-veined, 

 unequal, half the length of the paleaa ; paleai smooth, the lower one shorter ; sta. 3. 

 —Long Lsland (Kueiskem) to Me. and Mich. July. (Tilfa, Torr. Poa modesta 

 Tuckm.) 



6. CIN'NA, L. Sweet Reed Grass. Spikelets 1-flowered, com- 

 pressed ; glumes 2, subequal, without awns, upper one 3-veined; palese 

 '2, naked at base, on short stipes, lower one larger, enclosing the upper, 

 with a short awn a little below the tip ; stamen 1 ; grain oblong, free. 

 — 7i Erect, simple, tall, with a large panicle. 



1 C. p^ndula Triu. Culm smooth, 3 — 5f high ; Ivs. linear-lanceolate, 12 — 18' By 

 3 — 5", pale green, rough-edged, with smooth, striate sheaths ; stip. long, lacerated; 

 panicle white-green, near a foot in length, rather attenuated above and nodding, 

 with Uie brancJies capillary, drooping, and arranged somewhat in 4s ; glumes 2" 

 long, linear-lanceolate ; lower palece with u. short straight awn a little below the 

 tip. — y A beautiftd grass, sought by cattle, in rich, shady soUs, N. States 

 and Can. 



2 C. arundin^oea "WiUd. Culm and leaves as in No. 1. Plant bright green ; 

 panicle purjile and green, erect and with ascending or erect branches which are 

 floriferous more than half their length ; glumes ii" long, lanceolate, lower ^oZsa 

 awnless or the awn scarcely equaling the obtuse point. — U. S., in shady woods, 

 chiefly southward. A finer looking grass than the preceding. JL, Aug. 



7. MUHLENBER'GIA, Schreber. Drop-seed Grass. (In honor of 

 Henry Muhlenberg, D.D., an eminent American botanist.) — Spikelets 

 1-flowered, fl. sessile in the glumes and mostly bearded at the base ; 

 glumes 2, unequal, shorter than the pales, acute or awned, sometimes 

 minute, the lower rarely obsolete ; pales 2, the lower awned or mucron- 

 ate at apex, upper 2-keeled ; stam. 3 — 2 ; stig. 2, plumous; caryopsis 

 free. — Culms often branched. Panicles simple, mostly contracted. 



5 Mtthlenbergia. Ghimes manifest. Panicles slender, terininal and lateral. (*) 



* Glumes awned and twice longer than the awnless jialeffi No. 1 



* Glumes pointed, not longer than — the mucronate paleaa Nos. 2, 3 



— the long-awned patete Nos. 4, 5 



4 Braohtelytbum. Glumes minute, the lower obsolete. Panicle slender Nos. 6, T 



\ TRicnoCHLOA. GIvimes small, both present. Panicle diffuse, capillary No. 8 



1 M. glomer^ta Trin. Glaucous ; culm compressed, erect, smooth, with ap- 

 pressed branches or subsimple, 1 } I f high ; Iva. somewhat 2-rowed, erect, flat, 

 rough, 3 — .'/long, with closed sheaths; panicle spicate, dense, cooglomerated, in- 



