360 ENDOGENOUS PLANTS 



Culms 2 to 3 feet long, smooth; nodes swelling. Leaves 4 to 6 inches long; 

 tTteaths smooth, open. Panicles slender, with the spikelets often densely clustered 

 on the branches; glumes with a slender acumination, nearly equal; lower palea 

 ending in an awn, which is often purple, and 4 or 5 times as long as the spikelet. 

 Hob. Borders of woods ; clearings, &c. : frequent. Fl. Sept. Fr. Octo. 



5. M. Willcleiluvii, Trinius. Culm erect, nearly simple; 

 panicle slender, loosely-flowered; glumes about half as long as the 

 lower palea. 



Agrostis tenuiflora. Willd. $ FL Cestr. ed. 2. p. 57. 



WlLLDENOW's MUHLENBERGIA. 



(Mm about 3 feet high, sometimes with a few appressed branches, retrorsely 

 pubescent near the nodes. Leaves 6 to 9 inches long, broadish, rough ; sheaths 

 roughish-pubescent. Panicle with long, rather remote, filiform, erect branches. 

 Lower palea terminating in an awn which is 3 or 4 times as long as the 

 epikelet. 

 llab. Open, rocky woodlands : frequent. Fl. Aug. Fr. Sept. 



6. SI. diffusa, Schreber. Culms diffusely branched, slender ; 

 panicles rather slender, often purplish; glumes minute, the lower 

 one obsolete. 



SPREADING MUHLENBERGIA. Drop-seed Grass. 



Culms 6 to 12 and sometimes 18 inches long, decumbent, geniculate, compressed, 

 smooth, very slender and rather wiry. Leaves 1 to 2 or 3 inches in length, divar- 

 icate, roughish ; sheaths smooth, rather open, pubescent at throat. Panicles ter- 

 minal and lateral, 3 to 6 or 8 inches long, the branches alternate, rather distant, 

 appressed ; spikelets racemose, pedicellate ; lower palea terminating in a very 

 elender awn, which is generally purplish, and a little longer than the palea. 

 Hob. Pastures; yards, Ac. : common. FL Aug. Fr. Sept. 



Obs. This delicate little grass is rather abundant, in autumn; 

 but neither has it, nor any of the species here described, much 

 agricultural value. 



4?4. BRACHYEI/YTRIJM, Beauvois. 



[Gr. Brachys, short, and Elytron, a cover ; alluding to the very short glumes.] 

 Spikelets few, in a simple racemose panicle, each spikelet with a 

 filiform pedicel of an abortive second florest. Lower glume obsolete ; 

 the upper one subulate, persistent. Paleae involute, scabrous, the 

 lower one 5-nerved, terminating in a long straight awn, the upper 

 one 2-pointed, the sterile pedicel lodged in the groove on its back. 

 Stamens 2. Perennial : rhizoma creeping ; culms simple ; spikelets 

 long. 



1. IS. aristatuin , Beauv. Culm erect, retrorsely pubescent ; 

 leaves rather broadly lance-linear, rough, with pubescent sheaths. 

 Muhlenbergia erecta. Schreb. $ Fl. Cestr. ed. 2. p. 58. 

 AWNED BRACHYELYTRUM. 



Culm 2 to 3 feet high. Leaves 4 to 6 inches long, scabrous, somewhat hairy, 

 ciliate on the margins. Panicle erect; spikelets all pedicellate, half an inch long ; 

 paleae strongly nerved, scabrous, the lower one terminating in an awn, which is 

 more than twice as long as the palea. Seed linear, grooved on one side, with a 

 long white pubescent acumination. 

 Sab. Rocky woodlands : frequent. Fl. July. Fr. Aug. 



