422 POACE.E. 



A pretty reddish-topped grass found in the regions above 

 enumerated on dry mesas at the foot of hills, doubtless infrequent. 



13. B. Burkei Scribn. S. Wats, in Proc. Am. Acad. 18:170 

 (1883). Bull. Torr. Club, 11: 5 (1884). 



A tufted perennial, 10-30 cm. high. Culms very slender, erect 

 or geniculate. Blades glaucous, 10-40 cm. long, 1 mm. wide, often 

 with a few scattered hairs. Spikes 3-G, rather loose, nearly erect, 

 about 1.5 cm. long. Empty glumes smooth, ovate, nearly equal, 

 first about 3 mm. long, second longer, both usually very short- 

 awned just below the bifid tip; floral glume br ..?,, hairy, over 1 mm. 

 long, bearing 3 nearly equal-winged seta?, about 4 mm. long; i>alea 

 oval, with no projecting setae; rachilla slender, smooth, O.T mm. 

 long, bearing 3 equal setse 5 mm. long, widening below. 



Texas, Mrs. Anna B. Nichols, communicated to Professor 

 Scribner by Isaac Burk of Philadelphia, for whom the species is 

 named. 



Sandy plains of Upper Concho, western Texas, lieverchon 1361, 

 Curtiss 3440* ; distribution of North American Plants, Berlandier 

 107, 1437; U. S. Dept. Agricul. 510; Mexico, Pringle 1974. 



14. B. curtipeudula (Michx.) Torr. Emory's Kep. 153 (1848). 

 Chloris curtipeudula Michx. Fl. Bor. Am. 1 : 59 (1803). Bonfeloua 

 racemosa Lag. Var. Cienc. 2: Part 4, 141 (1805). Dinebra curti- 

 vcndula DC. Cat. Ilort. Monsp, 105 (1813). Eutriana curtijjen- 

 diila Trin. Fund. Agrost. Kil (1830). 



A tufted perennial, 30-100 cm. high, from r^liort rootstocks. 

 Lower leaves from the taller culms sometimes 40 cm. long, 4 mm. 

 wide, the upper usually 5-10 cm. long; sheaths and ligule often 

 hairy. Spikes 30-60, about 1 cm. long, on short bent pedicels on 

 one side of an axis 15-30 cm. long. Spikelets purple, brown, or 

 green, 4-10 in a spike, 5-8 mm. long, the lowest the shortest; 

 empty glumes 1-nerved, first lanceolate, 2.5-4 mm. long, with an 

 awn 1 mm. long or less, second glume ovate-lanceolate, 3.5-8 mm. 

 long, including a short awn; floral glume sparsely hairy, membran- 

 ous, ovate-lanceolate, 5-6 mm. long, mucronate, the lateral sette a 

 little shorter; palea as long and as wide as its glume, 2-toothed; 

 rachilla 0.5 mm. long, bearing abroad divided empty glume 2 mm. 



