ALOPECURUS. CLXL GRAMINEZ. 601 
glumes, surrounded with hairs at base; scales linear-lanceolate, 
longer than caryopsis ; styles 3-parted ; stig. 3. 
P. arenaria. Palis. (Arundo. Linn. Ammophila. Lindl.) Mat Grass. 
#t. creeping extensively; st. erect, rigid,2—4f high; is. involute, 1f by 3’, 
smooth and glaucous, pungently acute; sheaths smooth; stip. oblong; panicle 
dense, with erect, appressed branches, 6—10’ long, and an inch thick; spikelets 
compressed, greenish-white ; lower pale@ longer than the upper. 2 On sandy 
sea-coasts, Can. to N. J. At Dorchester, Mass., this grass is extensively manu- 
factured into paper. Aug. 
13. CALAMAGROSTIS. Adans. 
Name compounded of Calamus and Azrostis. 
Panicle contracted; glumes 2, subequal, acute or acuminate; 
palez 2, mostly shorter than the glumes, surrounded with hairs at 
base, lower one mucronate, mostly awned below the tip, the upper 
one often with a stipitate pappus at base. 
1. C. Cawanensis. Palis. (C. Mexicana. Nuit. C. agrostoides. Ph. Arundo. 
Michz.) Reed Grass. Blue-joint—St. smooth, erect, rigid, 3—5f high; ls. 
linear-lanceolate, striate, with smooth, veined sheaths; panicle erect, rather 
loose, oblong, the branches capillary, aggregated in 4s and 5s; glumes very 
acute, smoothish, much longer than the palez; lower palee bifid at the apex, 
with an exserted awn arising from below the middle of the back. % Wet 
grounds, N. Eng. W. to Mich. Makes goodhay. Common. Aug. 
2. C. coarcrata. Torr. Gee glauca. Muil. Arundo stricta. Spr.) 
Glaucous; st. erect, high; Jvs. linear-lanceolate, scabrous. with the 
veins and keel white; sheaths striate; stip. oblong, obtuse; panicle condensed and 
spike-form, the branches rigidly erect, short and aggregated ; glumes acuminate, 
lanceolate,lower 1-vyeimed, upper 3-veined; lower palee 5-veined, bifid at the 
apex, with a short, straight awn a little below the tip—2 Bogs, Free States and 
Brit. Am. July, Aug. 
3. C. BRevIPiLIs. Torr. (A. Epigeios. Mul.) 
St. terete, 3—4f high; Jws. broad-linear, the sheaths glabrous; stip. hairy; 
panicle pyramidal, loose, with the diffuse, capillary branchessolitary or in pairs; 
glumes unequal, bearded at base, acute, 1-veined, shorter than the equal, obtuse, 
awnless palee; pappus Very short, not half the length of the palee—U In 
sandy swamps, N. J., Torrey. 
4. C. purpurAScENS. Brown. (C. sylvatica. Tyin.} 
_ Panicle spicate; glumes scabrous; palee@ 2, the lower scabrous, 4-toothed 
at the apex, awned upon the back; abortive rudiment plumose, twice longer 
than the hairs at its base—White Mts., N. H., Tuckerman. Recky Mts., Rici- 
ardson.—V ery rare and unimportant. 
5. C. rwexpansa. Gray. 
St. 2—5f high, erect, simple; lvs. 2—3” wide, smooth; panicle 4—8’ long, 
slender, contracted, branches short, appressed, 4 or 5 together; glumes oblong- 
lanceolate, 23’ long, rough on the keel and sides, acute; palee nearly equal, 
acute, oblong, as long as the glumes, lower one rough, 3-veined, notched at tip, 
with a short awn inserted below the middle, nearly as long as the flower.— 
Penn Yan, N. Y. Sartwell. Aug. 
Tree 3. PHLEOIDE#.—Infioresence in dense, cylindric or unilateral 
spikes. Spikelets 1-flowered. Glumes 2, of nearly similar texture with the 
palez. 
14. ALOPECURUS. 
Glumes subequal, connate, distinct ; paleze united into an infiated 
glume, cleft on one side below the middle, generally awned ; styles 
often connate. 
