"778 Okdkr 156.— GEAMINB-S!. 



nate ; palese 2, mostly shorter than the glumes, surrounded with white, 

 bristly hairs at base, lower one mucronate, mostly awned below the tip, 

 the upper one often with a stipitate pappus (abortive rudiment of a 

 second iSower) at base. — 2J! Ehizomes creeping. Culms simple, tall, 

 with a contracted or open panicle. 



§ Panicle expanding. Glumes some shorter than the palejB. Eudiment none Nos. 1, 2 



§ Panicle contracted. Gl. some longer than paleffi. Eudiment plumous. (*) 



* Glumes 2 — 3" long. Palea short-awned — above the middle No. 3 



— below the middle Nos. 4, 6 



* Glumes 5—7" long. Palea scarcely awned near the tip No. T 



1 C. brevipilis Torr. Culm terete, shnder, 3 — U high; Ivs. broad-linear, the 

 sheaths glabrous ; ligulo hairy ; panicle pyramidal, loose, with the diffuse, capil- 

 lary branches solitary or in pairs ; glumes unequal, bearded at base, ovaU, acute, 

 1-veined, shorter than the equal, obtuse, awnless pales; papjius or hairs very short, 

 not half the length of thepalecs. — 1( In sandy swamps, N. J. (Torroy). (A. Epi- 

 geios Muhl.) 



2 C. longifolia Hook. Culm 2 — if high, stout; Ivs. rigid, involute-filiform, 

 tapering to a long point ; panicle pyramidal ; glumes unequal, lamceolate, the v/pper 

 as long as the equal pales; pappus-like hairs copious, more than half the length of 

 the pales. — Sandy shores of the great Lakes, N. Mich, and G. W. 



3 C. coarct^ta Torr. Glaucous ; culm erect, 2 — 4f high ; Ivs. linear-lanceolate, 

 scabrous, with the veins and keel white ; sheaths striate ; slip, oblong, obtuse ; 

 panicle condensed and spike-form, the branches rigidly erect, short and aggre- 

 gated ; glumes acuminate, lanceolate, lowei: 1-veined, upper 3-veined, lower pale 

 5-veineU, bifid at the apex, with a short, straight awn just above the middle of the 

 hack. — If Bogs, Mass. to Minn, and S. States? July, August. (Agrostis 

 glauca Muhl. ' Arundo slricta Spr.) 



4 C. purpurSscens Brown. Panicle spicate, purplish, 3 — 6' long, half the 

 length of the culm ; glumes scabrous ; paleae 2, the lower scabrous, toothed at 

 the apex, awned upon the back below the middle ; abortive rudiment plumous, 

 twice longer than the hairs at its iase, and twice shorter than the pales. — White 

 Mts., N. H. (Tuckerman), Rocky Mts. (Richardson). — Rare and unimportant. (C. 

 Pickeringii Gr. C. sylvatica Trin.) 



5 C. confinis ITutt. Culm 2 — 5f high, erect simple; Ivs. 2 — 3" wide, smooth; 

 panicle 4 — 8' long, slender, contracted, branches short, appressed, 4 or 5 together ; 

 glumes oblong-lanceolate, 2^" long, rough on the keel and sides, barely acute; 

 palecB nearly equal, acute, oblong, as long as the glumes, lower ono rough, 3-veined, 

 notched at tip, with a short awn inserted below the middle, nearly as long as the 

 flower ; hairs f the length of the pales. — Penn. and Penn iTan, N. T. (Sartwell). 

 Aug. (C. inexpansa Gr.) 



6 C. Canadensis Beauv. Reed Grass. Blub Joint. Culm smooth, erect, rigid, 

 3 — of high ; Ivs. linear-lanceolate, striate, with smooth, veined sheaths ; panicle 

 erect, rather loosso, oblong, the branches capUlary, aggregated in 4s and Ss ; ghi/mes 

 very acute, sirnoothish, much longer than the palece ; lower palem bifid at the apex, 

 with a hair-like awn arising from below the middle of the back; hairs as long as 

 Hie pales. — y Wet gi-ounds, K. Eng. W. to Mich, and Can. Makes good hay, 

 common. Aug. (C. Mexicana Nutt. C. agrostoides Ph. Arundo Mx.) 



7 C. aren^ria Roth. Mat Gkass. Sand Reed. Et. creeping extensively; 

 culm erect, rigid, 2 — If high; Ivs. involute. If by J', smooth and glaucous, pun- 

 gently acute ; sheaths smooth ; stip. oblong ; panicle dense, with erect, appressed 

 branches, C — 10' long, and au inch thick; spikolets compressed, greenish-white; 

 lower paleaj longer than the upper. — 2( On sandy lake shores and sea coasts, 

 Can. to N. J. Of great value in confining loose, sandy beaches. Aug. (Ammo- 

 phila. Host. Psamma, Palis. Arundo, L.) 



10. ALOPECU^RUS, L. Fox-Tail Gkass. (Gr. AXuttt^I fox, ov^d, 

 tail.) Spikelets 1-flowered ; glumes subequal, connate, distinct, flat- 

 carinate ; lower pale flat-carinate, generally equaling the glumes, awned 

 on the back below the middle ; upper pale wanting; styles often con- 



