Muhlenberg i a. 



GRAMINEjE. 



437 



5. Muhlenbergia sobolifera, Trin. Awnless Muhlenbergia. 



Culm erect, somewhat branched ; panicle simple, very slender or filiform, the branches 

 appressed ; palese equal, longer than the oblong acute glumes, hairy at the base, awnless, the 

 lower one mucronate at the tip. — Trin. diss. 1. p. 89. t. 5. /. 4 ; Gray, Gram. Sf Cyp. 2. 

 no. 107. Agrqstis sobolifera, Muhl. gram. p. 70; Willd. ennm. 1. p. 95 ; Torr. fl. 1. p. 

 87 ; Beck, hot. p. 388 ; Darlingt. fl. Cest. p. 56. Cinna sobolifera, " Link, enum. 1. p. 71," 

 ex Kunth, enum. I. p. 207. 



Rhizoma perennial, creeping, woody. Culm erect or assurgent, about two feet high ; the 

 branches few, erect and slender. Leaves about 2 lines wide, pale green : sheaths open : 

 ligule nearly wanting. Panicle with the flowers rather crowded, on slender branches. Glumes 

 somewhat unequal, about one third shorter than the paleae. Lower palea conspicuously hairy 

 at the base, roughish, with a short slender point at the tip. Stamens 3. Stigmas purplish. 



Open rocky woods. Fl. August - September. 



6. Muhlenbergia glomerata, Trin. Cluster-spiked Muhlenbergia. 



Panicle oblong, thyrsoid, interrupted at the base ; glumes linear, acuminate, nearly equal, 

 awned, twice the length of the awnless paleae. — Trin. diss. 1. p. 191. if. 5. f. 10 ; Kunth, 

 enum. 1. p. 200. Polypogon glomeratus, Willd. enum. 1. p. 87. P. setosus, Spreng. mant. 

 1. p. 31. P. racemosus, Nutt. gen. 1. p. 51 ; Torr. fl. I. p. 97; Beck, hot. p. 390. Agrostis 

 racemosa, Michx. fl. I. p. 53 ; Pursh, fl. 1. p. 65 ; Bigel. fl. Bost. p. 29. A. setosa, Muhl. 

 gram. p. 68. Cinna racemosa, Kunth, enum. I. p. 207. 



Culm erect, a little compressed, smooth, mostly naked towards the base, simple, or with a 

 few erect branches above. Leaves sowewhat distichous, 3-5 inches long, erect, rough, more 

 or less glaucous : sheaths smooth, a little open : ligule almost wanting. Panicle 2-3 inches 

 long : branches thick and spikelike, many flowered, the lower ones remote. Glumes very 

 slender, terminating in a long rough straight bristle. Palea? sessile, hairy on the lower part 

 and at the base, each 3-nerved. Stamens 3 : anthers yellow. Caryopsis oblong-cylindrical. 



Swamps, and in dry sandy barrens. Long Island, and the western part of the State. Fl. 

 August - September. 



7. Muhlenbergia Mexicana, Trin. Mexican Muhlenbergia. 



Culm erect, branched ; panicles terminal and lateral, contracted, densely flowered ; glumes 

 unequal, linear-lanceolate, very acute ; paleae hairy at the base, about as long as the glumes, 

 awnless, very acute. — Trin. diss. 1. p. 189. M. foliosa, Trin. I. c.1 Agrostis Mexicana, 

 Linn. mant. p. 31 ; Muhl. gram. p. 67. A. lateriflora, Michx. fl. 1. p. 53 ; Pursh, fl,. 1. p. 

 64; Torr. fl. I. p. 86 ; Beck, bot. p. 388; Darlingt. fl. Cest. p. 56. Cinna Mexicana, 

 Link, enum. 1. p. 71, ex Kunth, enum. 1. p. 206. C. lateriflora, and ? filiformis, Kunth, I. c. 



