444 GRAMINEiE. Calamaorostis. 



Tribe VI. ARUNDINACEJE. Kunth. 



Spikelets either one-flowered ( with or without an abortive pedicel ) , or many-flowered. 

 Flowers usually with long soft hairs at the base. Glumes and palecB 2, membranaceo- 

 herbaceous. — Mostly tall perennial grasses, 



21. CALAMAGROSTIS. Adans. ; Trin. diss. I. p. IS3. SMALL-REED. 



[From the Greek, caXamos, a reed, and agrostis, a genus of grasses.] 



DETE0XIA, Beauv. 



Spikelets one-flowered. Glumes longer than the paleae. Paleae somewhat equal, with long 



hairs at the base, and an abortive pedicel or rudimentary flower ; the lower one with a short 



awn near the top or on the back. — Panicle branching ; the spikelets all pedicellate. 



1. Calamaorostis Canadensis, Beauv. (Plate CL.) Canadian Small-reed. 



Panicle oblong, loose ; glumes nearly equal, serrulate on the keel, a little rough on the 

 sides ; paleae as long as the glumes, the lower one with a somewhat exserted awn on the back 

 below the middle ; hairs as long as the palea ; culm and leaves smooth. — Beauv. ; Torr. 

 in Gray^s Gram, <^ Cyp. part I, no. 18; Darlingt. fl. Cest. p. 62; Kunth, enum. 1. p. 

 237, not of Nutt. C. Mexicana, Nutt. gen. 1, p.46 (excl. syn. Pers.) ; Beck, bot. p. 401. 

 Arundo Canadensis, Michx. fl. 1. p. 73; Pursh, fl.l. p. 86 ; Torr. fl. 1. p.83; Bigel. fl. 

 Bost. p. 38. C. Purshii, Kunth, enum. 1. p. 208. A. confinis, Willd. enum, 1. p. 127 (fide 

 Muhl.). k. cmnoiies, Muhl. gram, p, 181. A. agrostoides, Pwrsi^, Z. c. 



Culm 2-4 feet high, mostly simple. Leaves a foot long and 3-4 lines wide, flat, some- 

 what glaucous, slightly pubescent above, smoothish underneath ; sheaths close : ligule oblong, 

 lacerate. Panicle erect, at length somewhat expanding ; the branches 4-6 in a whorl, 

 rough. Glumes lanceolate, very acute, keeled ; the sides purplish. Paleis unequal, oblong, 

 rather obtuse : lower one slightly 2-toothed at the summit, awned a little below the middle, 

 the awn projecting beyond the flower : upper one entire. Hairs at the base of the paleae 

 copious, white. Rudiment small, clavate, with long hairs at the summit. Stamens 3 : anthers 

 large, yellow. 



Wet meadows : common in the interior of the State, but rare near the seaboard. Fl. 

 August. 



2. Calamagrostis coarctata, Torr. (Plate CLI.) Glaucous Small-reed. 



Panicle contracted, tjiick and somewhat conglomerate ; glumes narrowly lanceolate, nearly 

 equal, a little longer than the paleae, carinate ; lower palea awned a little below the tip ; hairs 

 two-thirds as long as the flower ; leaves glaucous. — Torr. in Gray's Gram. <^ Cyp. part 1. 

 no. 19 ; Darlingt. fl. Cest. p. 62. C. Canadensis, Nutt. gen. 1. ;;. 46 ; Trin, diss, 1. p. 



