149 



Fig. 143. CALAMAGROSTIS BREVISETA (a. Gray) Scribn. Mem. Torr. 

 Bot. Club, 5 : 41. 1894. (C. sylraiicabrevii<eta A. Gray, Man. Bot.582. 1848; C.pick- 

 eringii A. Gray, ihid,ed. 2, 541. 1856.) SHORT-AWNED REED-GRASS.— A slen- 

 der perennial 3-5 dm. (lo-2°) high, with flat leaves and narrow or subpyramidal, 

 rather densely flowered, purplish panicles 8-12 em. (3'-5') long. Spikelets 3-4 

 mm. (li"-2") long; empty glumes (a) acute, somewhat exceeding the obtuse 

 scabrous flowering glume {b, c), the geniculate awn equaling or slightly exceed- 

 ing the glume; the rudiment (e) and basal hairs short.— Moist ground, 

 Newfoundland, Cape Breton Island, and Labrador to the mountains of New 

 Hampshire, Vermont, and New York. July, August. 



Varieties: 1. debilis. Kearney, U. S. Dept. Agr. Div. Agros. Bui. H : 25. 1898. 

 Of softer texture with more slender culms, thin, lax leaves, and smaller, con- 

 tracted, almost spiciform panicles. 2. lacustris Kearney 1. c. Taller, 5-10 dm. 

 (20-3i°) high, with stouter rootstocks, longer leaves and panicles, shorter palea, 

 and more copious and longer callus hairs, three-fourths as long as the flowering 

 glume. 



