AGROSTIDE.E. 



269 



allied to some species of Stipa, but the rachilla is produced beyoud 

 tlie floral glume into a little bristle, sometimes bearing a minute 

 rudimentary glume. 



1. B. erectum (Srhrel).). Boauv. Agrost. 39 t 



(1812). MHhJcnbergia erecta Schreb. Griis. \ 



3:139, t. 50 (1772-70). Dilepyrum aristosum 

 Michx. Fl. Bor. Am. 1 : 40 (1803). Mulilenhergia 

 aristata Pers. Syn. 1 : 73 (1805). Bracliyelytrum 

 aristatum E. & S. Syst. 2:413 (1817). Muhlen- 

 hergia hrachyehjtmm Trin. Uuifl. 188 (1824). 

 Mem. Acad. St. Petersb. (VI). G, 2:300 (1845). 



Culms slender, erect, tufted, 30-GO cm. high, 

 coming from a dense perennial rootstock, often 

 finely pubescent, especially at the nodes. Sheaths 

 shorter than the iuternodes; ligule 2 mm. long; 



b a 



Fig. 46. — Brnchyelytrum erectum'. A, spikelet; a, floral glume; h, palea and 

 bristle. (Richardson. ) 



blades flat, elliptical-lanceolate, scabrid, 9-nerved, 6-12 cm. long, 

 1-1.5 cm. wide. Floret ajipressed, more or less scabrous, linear- 

 oblong, about 1 cm. long, bearing an awn 1-2 cm. long. 



Vermont, Pnnyle ; Pennsylvania, Scribner for U. S. Dept. 

 Agricul, 33G; Virgmia, Small; Michigan, Cko'k 1003, 1103, 

 Farwell; Minnesota, Bailey B. 397. 



Dry rocky places and in woods, usually in scattered bunches. 



Florida and northward. 



