GKAMINK.E. (OH ASS FAMILY.) 0.>3 



glumes, the lower one with an awn :s -4 times as long as the Bpikelet. (Agros- 



tis tenuiflora, WUld.) — Dry rocky .soil in the upper districts. July and Au<*. 



Culms 3° high. 



+. 



3. M. diffusa, Schrcb. Culms diffusely branched, low j panicles long and 



slender; glumes very small, the upper one truncated ; awn of the palea twice as 

 long a.s the spikelet — Shaded waste places, Florida, and northward. Aug. and 

 Sept. — Culms 1° - U° high. 



§ 2. TRICHOCHLO A. — Panicle terminal, diffuse: spikelets on long and hair. 

 like stalks : culms tail and simple. 



4. M. capillaris, Eunth. Leaves rigid, elongated, convolute; panicle 

 erect, the long and purple, glossy branches and spikelets drooping; glumes nearly 

 equal, half as long as the palea), the lower one awned ; palea; unequal, the up- 

 per one barely awned, the lower 3-awncd, with the middle awn many times 

 longer than the spikelet. — Varies with both glumes long-awncd. (M. filipes, 

 Curtis.) — Sandy soil along the coast, and sparingly in the interior, Florida, and 

 northward. Aug. and Sept. — Culms 2° -4° high. 



5. M. trichopodes. Culms and leaves filiform, elongated ; panicle erect, 

 oblong ; spikelets linear, on spreading stalks ; palea) twice as long as the nearly 

 equal awnless glumes, ribbed ; the lower one tipped with a short awn, and with 

 the two lateral nerves slightly percurrent, hairy at the base. (Agrostis tricho- 

 podes, Ell. — Low pine barrens, Florida to North Carolina. Sept. y. — Culms 

 2° -3° high. Panicle rarely purplish. Leaves flat. 



11. BRACHYELYTRUM, Beauv. 



A perennial erect grass, with a simple slender culm, flat lanceolate leaves, 

 and a loose lanceolate simple panicle of large (£' long) 1 -flowered spikelets. 

 Lower glume obsolete, the upper minute, persistent and awnless. Palese rigid, 

 rough with short bristly hairs, the lower one concave, 5-ribbed, tapering into a 

 long straight awn, and enclosing the shorter 2-pointed upper one. An awn-like 

 pedicel of a second flower is applied to the back of the upper palea. Stamens 

 and long stigmas 2. Grain linear. 



?• 1. B. aristatum, Beauv. (Muhlenbergia erecta, Schreb.) — Dry rocky 

 places, Florida, and northward. July. — Culms solitary, 2° -3° high. 



12. CALAMAGROSTIS, Adans. Reed Bent-Grass. 



Perennial grasses, with rigid erect simplo culms, bearing a loose or contracted 

 panicle of 1 -flowered spikelets, with the hairy pedicel of a second flower at the 

 back of the upper palea. Glumes 2, nearly equal, keeled, longer than the palea?. 

 Palese 2, bearded at the base with long hairs, the lower oue awned on the back. 

 Stamens 3. Grain free. 



§ 1. CALAMAGROSTIS Proper. — Glumes and palea; membranaceous, the 

 former boat-shaped : panicle open or loose. 



1. C. coarctata, Torr. Panicle contracted, lanceolate; glumes lance- 

 olate, awl-pointed, rough-keeled, with a purple stripe near the margins ; lower 

 47 



