Calamagrostis. 



GR AMINES. 



445 



227. t. 4. /. 14 ; Beck, hot. p. 401. Agroslis glauca, Mulil. gram. p. 76. Arundo coarctata, 

 Torr. fl. 1. p. 94 ; Bigel. fl. Cest. p. 39. 



Culm 3-5 feet high, simple, erect, terete, somewhat glaucous. Leaves 3-4 lines wide, 

 flat, rough : ligule oblong, obtuse. Panicle 3-4 inches long, erect and compact : branches 

 short, 3 - 5 in a fascicle. Glumes nearly equal, about 3 lines long, lanceolate, acuminate, 

 mostly purplish, rough on the keel, and a little so on the sides : lower one without lateral 

 nerves ; upper one 3-nerved. Paleas about one-fifth shorter than the glumes, lanceolate, acute; 

 the lower one 5-nerved, finally split at the summit, with a short straight rigid awn arising 

 from the back about one-third of the way down. Rudiment stout, with a strong tuft of hairs 

 at the summit. Stamens 3 : anthers yellow. Caryopsis hairy. 



Wet meadows and open swamps along rivers : frequent. Fl. August. This and the follow- 

 ing species have the grain sometimes affected with ergot. 



3. Calamagrostis inexpansa, Gray. (Plate CLII.) Close-jlowered Small-reed. 



Panicle contracted, elongated ; glumes oblong-lanceolate ; paleas nearly equal, as long as 

 the glumes, the lower one with a scarcely exserted awn inserted below the middle ; hairs 

 nearly as long as the flower ; culm and leaves smooth. — Gray, Gram. Cyp.part 1. no. 20. 



Culm about 3 feet high, erect, terete, simple. Leaves 2-3 lines wide, smooth : ligule 

 oblong. Panicle 4-6 inches long, slender ; the branches short, appressed, 4 or 5 together, 

 rough. Glumes about 2§ lines long, a little serrulated on the keel, roughish on the sides, 

 acute, but not acuminate. Paleag unequal, rather acute, oblong ; the lower one rough, 3- 

 nerved, notched at the tip : awn inserted half way between the middle and the base of the 

 palea. Caryopsis oblong, smooth. 



Swamps, northern and western parts of the State. Fl. July -August. Near the preceding 

 species ; but distinguished by the more slender panicle, broader and less acute glumes, longer 

 hairs, and the awn inserted towards the base of the palea?. 



22. AMMOPHILA. Host. gram. 4. p. 24 ; Kunth, enum. 1. p. 245. sea-reed. 



[From ammos, sand, and philos, a lover.] 

 Psamma, Bcauv. 



Glumes nearly equal, keeled. Paleas shorter than the glumes, surrounded with short hairs 

 at the base, keeled, awnless. Abortive pedicel plumose above. — Rhizoma long and creep- 

 ing. Leaves convolute. Panicle spiked, dense, and cylindrical. 



1. Ammophila arundinacea, Host. Common Sea-reed. 



Glumes acute ; hairs about one-third the length of the paleas. — " Host. gram. \.p. 24. t. 

 41 ;" Kunth, enum. 1. p. 245 ; Hook. fl. Bor. Am, 2. p. 241. Arundo arenaria, Linn. sp. 

 I. p. 121 ; Michx. fl. 1. p. 73 ; Pursh, fl. 1. p. 87 ; Muhl. gram. p. 88 ; Bigel. fl. Bost. 

 p. 39. Psamma littoralis, Beauv. agrost. p. 143. t. 6. f. 1. P. arenaria, Rcem. Schult. 



