410 POACE.E. 



nun. lonjj, luiirv ul)ovo, bi'iirin;; ;{ iiwl-sliapetl auta,', 2 mm. loiifj, tlio 

 lateral ones bt-urinjjf a tliin inar<?iiial appcndaf^o; racbilla U'lminat- 

 in<,' in a iniiuite truiicati' empty awnh'ss <,'Inme. 



New McxIl-o, J*)-i)i(/h; Vaxvij; Mexico, Priiif/Ic WM, Poliiicr 

 3400, Sr/iajf'tier lOlG. 



('oI(ti'ad(), Arizona to New ^[exico. 



'Z. B. stolonifera Scril)n. I'roe. Aoad. Pliila. .'502 (1891). //. 

 seorjn'oidi's S. Wats, in I'rof. Am. Aead. IS: 110 (ISSIj) not Laj^. 



Culms slender, li-lO em. lii;j;ii, hearinrj racemes. Leal'-lilsides 

 narrow, glabrous, 1-!J em. long. Spikes solitary, racbis l,.')-3 cm. 

 long. S])ikelets not crowded, empty glumes 1 -nerved, lirst lanceo- 

 late, 3 nun. long, witb an awn 1 nun. or more long, second 

 broader, about (5 mm. long, short awned, tliiidy pubescent on the 

 keel; lloral glume 5-G mm. long, 3-lobed for about one-fourth of 

 its length, central seta 5-7 nun. long, lateral ones a third shorter; 

 ])alea about G nun. long; rachilla nearly smooth, 3 nun. long, 

 bearing some setiB 15 mm. long. 



^lexico, /'n'tif/h' 317-4, on the jdains, [ja Ilouda Station. 



3. B. ramosa Scribn. Vasey, (Jrasses Southwest l:i. 44 (1890). 

 Ji. oh'f/i>fifac/tj/(i var. ranuisa Scril)n. 



A densely tufted slender light green perennial, 20-40 cm. high. 

 Culms branching below, nodes smooth. Lower sheaths 'Z cm. long, 

 ciliate at the throat, those of the culm 5-7, the lower nearly as long 

 as the internodes; ligule a ciliate ring; blades of sterile shoots and 

 culms 3-8 cm. long, about 2 mm. wide, involute, apex filiform, 

 curved. Spikes 1-2 in number. 1.2-1.7 cm. long, linear, very 

 slightly falcate, pubescent, pedicels 2 mm. long. Empty glumes 

 villous, lanceolate, 1-nerved, first 1.7 mm. long, second 3.2 mm.. 

 long; lloral glume oval-ovate, the back shortly pubescent, 4 mm. 

 long, the 3 setne about 1 mm. long; paloa as long as its glume, with 

 3 very short setae; rachilla hairy, 0.7 mm. long, bearing 3 seise 

 3-4 cm. long. 



Southwestern Texas, XeaUei/ for Xat. Museum. 



It grows in bushy clumps with nuich-branching perennial culms, 

 Avith the habit of M nhJcnhergia Texamt, and is confined to calcare- 



