300 POACK.E. 



natural Bcctions have yt-t lucn i»i(H)()so«l. Anutug tho ByiioiiytiiM 

 ubov(t aru Huvurul wlii(;li hoiiiu oiio or iiioro itcrsotiH have luujioscd 

 U8 j,'('H(!ri<! luimcs for oin' (»r iiioro HpiM'iL'K (»(' hanlhnnia, 



A. Floral j^liiiiio I'lotlied with nuiiu'roiis lon^' Hilky liairH. . . 1 



|{. Kioral ;;liiriio with few silky liairH (a) 



u. Knipty j,'liini(!s S-l-ncrvetl •.• 



n. Mmpty ^dimiort H-!»-iiervi'(l ;{ 



a. Kiiipty ;,'liim('s It-ri-iuM-vctJ (h) 



1). licaf-hlailcs short, tho lower curly 4 



b. L('ar-l)la(los loiijj, not curly r>, G 



1. D. sericea Nutt. den. 1:71 (181H), 



(/'ulnis not tufted. HO-lOO cm. Ion;,'. Sheaths silky hairy; 

 blades narrow, often lU) cm. Ion;;, i'aniclc narrow, 4-13 cm. lon^j. 

 Spikelets 7-tlowered, ompty glumes nearly cfjual, 17 mm. long. 

 ft-H-nerved. much exceeding the florets; lloral glume mm. long 

 to the base of the teeth, which are over half as long, conspii-tiously 

 hairy, especially near the margins; awns about 14 mm. long, flat 

 and brown at the base, twisted two to three times; paloa shorter, 

 4-') mm. long. 



Massachusetts, J. W. liohbitis; New Jersey, Parh-or for Scrib- 

 iier ;ir»4',* ; South Carolina, danhji; l<Morida, Cyrtiss \\h\'Z. 



Dry soil, New Kngland to Florida. Colorado and California. 



2. D. Californica IJcdand. Proc. Calif, Acad. 3: 1S2 (ISO;}). 

 Cuhns sometimes decumbent, 30-100 cm. high. Sheaths 



sparingly hairy; blades smooth, narrow, involute, 3-10 cm. long. 

 Uaoeme simple, of 3-10 spikelets. Spikelets broad. 5-10-flowered, 

 on pedicels of their own length; emjity glumes nearly equal, 1.5-3.5 

 cm. long, reaching as far as the florets, 5-7-nerved, cross-veins con- 

 spicuous under a lens; floral glume broad, firm, shining, hairy near 

 the nuirgins. about 9 mm. long to base of the teeth, which are one- 

 third as long, 9-nerved; awn brown at tlio base, about 1 cm. long, 

 and twisted once around; palea reaching nearly to the base of the 

 teeth on the floral glumes, obtnse. with many short spreading hairs 

 on the nerves. Crain oblong, flattened, concave, 4 mm. long. 



Montana. Watxini 453; California, Bolander 10, Howell 363, 

 Hall mo, Ki'llogy HOG. 



