776 OBDEB 156. GRAMliJE^E. 



slender, 3 6' long, wholly inclosed in the terminal swelling sheath; glumes Une- 

 qual, very white, much shorter than the white, subequal, obtuse pales; grain oval, 

 as long (") as the pales. -W. N. Y. (Mr. R. S. Brown) and southwestward. 

 After the sheath falls away the mature Us* turn brownisb. (Agrost. longill 

 Torr. ?) 



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

 tapering to filiform; sheath beardless at throat; joints blackish; panicle long (If), 

 sknder, open, composed of short, erect, alternate spike-like racemes; glumes 2, un- 

 equal, much shorter than the subequal pales; grain dark resin-colored, oblong, 

 % as long as pales, Pastures and waste grounds, S. States. (A. Indies L.) W. 

 Indies. 



9 S. compressus Torr. Glabrous; culm erect, much compressed, simpk, 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 feto and erect; glumes equal, acute, shorter than 

 the palese, the upper emarginate, rarely mucronate; palea? ovate, obtuse, smooth, 

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



10 S. serotinus Torr. Culm 1 2 18' high, filiform, compressed, growing in 

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

 sheaths open; stip. ovate, short; panicle 310' long, capillary, diffuse, branches 

 llexuous, alternate; spikelets elliptical, scarcely -J'' long; glume ovate, 1 -veined, 

 unequal, half the length of the paleas; paleae smooth, the lower one shorter; sta. 3. 

 Long Island (Kneiskern) to Me, and Mich. July. (Vilfa, Torr. Poa rnodesta 

 Tuckm.) 



6. CIN'NA, L. SWEET REED GRASS. Spikelets 1 -flowered, com- 

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

 L', 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, 1'rec. 

 If Erect, simple, tall, with a large panicle. 



1 C. pendula Trin. Culm smooth, 3 5fhigh; Ivs, linear-lanceolate, 12 18' oy 

 o5", pale green, rough-edged, with smooth, striate sheaths ; stip. long, lacerated; 

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

 wiHi the I/ranches capillary, drooping, and arranged somewhat in 4s; glumes 2" 

 long, linear-lanceolate ; lower paleae with a short straight awn a little below the 

 tip. If A beautiful grass, sought by cattle, in rich, shady soils, N. States 

 and Can. 



2 C. arundinacea "Willd. Culm and leaves as in No. 1. Plant bright green ; 

 panicle purple and green, erect and with ascending or erect branches which arc 

 floriferous more than half their length ; glumes 3" long, lanceolate, lower palece 

 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 Muhlenbery, D.D>, an eminent American botanist.) Spikelets 

 1 -flowered, 11, 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-kceled ; stam. 32 ; stig. 2, plumous; caryopsis 

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



MUHI.KXBERGIA.. Glumes manifest. Panicles slender, terminal and lateral. (*) 



* Glumes awned and tv.ice longer than the awnless palew No. 1 



* Glumes pointed, not longer than the mucronate paleae Nos. 2, S 



the long'awned pale*. Nos. 4, . r > 



S BRACIITELYTIU-M. Glumes minute, the lower obsolete. 1'nnicle slender Xos. C, 7 



$ TRICHOCIILOA. Glumes small, both present. Paniclo diffuse, capillary No. 8 



1 M. glomerata Trin. Glaucous ; culm compressed, erect, smooth, with ap- 

 pressed branches or subsimple, 14 4f high ; Ivs. somewhat 2-rowed, erect, flat, 

 rough, 3 5' long, with closed sheaths ; panicle Bpicate, dense, conglomerated, in- 



