X02 TRIANDRIA. DIGYNIA. anthoxanthum. 



FIosculus intermedius hermaphroditus, lateralibus fere triplo 

 brevior. Gtumx coralUnx obtusiusculse, muticae. Stylus bas^ 

 simplex. Stigmata longissima. Semen liberum, sulcatum." 

 P. de B. 1. c. 



22. BRACHYELYTRUM. Beauv. 



Calyx very minute; inferior glume scarcely per- 

 ceptible. Corolla with the inferior valve terminated by 

 a long bristle ; superior valve with a clavate rudiment 

 at the base. P. de Beauv. t. IX, f. 2. Tririo 



AgrOSt. 54. MUHLENBERGIA S C lir 6 b, DiLEPY- 



RUM Mich. Panicles racemose. 



B. arislalum Beauv, Ro em. ^ S chul t. 11. p. 4 1 3, 

 MuHLENBERGiA erectu R I h. n. Beytr. I. p. 96. S c hr e b. 

 Gram. t. 50. P u r s h Fl. \. p, 6\. E U i o 1 1 Sk. i. p. QG. 

 Muhl. Gram. p. 57. M. aristata Pers. Syn. I. p. 76. Dx- 

 LEPYRUM a?-i.st.osum Mich, Fl. 1. p. 40. Panicle racemose. 

 Jioot creeping, soboliferous. Culm erect, simple, 2 — 3 feet high, 

 with pubescent nodes. Leaves pubescent, particularly on the 

 upper surface and on the margin, 4 — 6 inches long and nearly- 

 half an inch wide, erect, acute, nervose. Sheaths a little 

 opening, pubescent. Stipule membranaceous, obliquely trun- 

 cate, ciliate at the extremity. Particle contracted, consisting 

 of a few simple branches. Flowers all pedicellate, three times 

 as large as in the Muhlenbergia diffusa. Calyx 2-valved, 

 unequal ; inferior glume scarcely perceptible ; the other ten 

 times shorter than the corolla, linear-lanceolate. Corolla un- 

 equal, subulate ; inferior valve 5-nerved, a little scabrous, ter- 

 minating in a bristle twice as long as the flower; superior 

 valve smaller, involute, bifid at the extremity, with a groove 

 on the back, in which is lodged a slender scabrous pedicel 

 somewhat clavate at the extremity. Stamens 2 ; anthers li- 

 near, bifurcate, pale yellow. Stigmas 2, plumose. Seed ob- 

 long, acute. 

 Hab. On mountains and rocky hills; not uncommon in the in- 

 terior of the northern and middle States, from Canada to Penn- 

 sylvania. On the hills near Hoboken, New-Jersey ; rare, 

 June — July. 



23. PHRAGMITES. Trinius, 



Calyx 5 — 7-flowered. Florets on villose pedicels, 

 except the lowest, which is sessile and naked at the 

 base; inferior valve elongate, acuminate and invo> 

 lute; superior valve somewhat conduplicate. Trin. 

 Agrost. 73. AviVK DO Lin, P.de Be a u v. t. XIII. 



