III.-MISCELLAxNEOUS NOTES AND DESCRIPTIONS OF NEW 



SPECIES. 



By F. Lamson-Scribner and Carleton R. Ball. 



The notes and new species presented in the following pages were for 

 the most part elaborated in the preparation of a complete list of the 

 grasses of the Gulf States to accompany a report on the economic 

 grasses of that region. It is believed that the recognition of the five 

 species of Elynuix will greatly facilitate a better understanding of that 

 genus in the Eastern and Southern States, from both the economic and 

 systematic standpoints. F. L.-S. 



ANDROPOGON ARGYRiEUS MACRUS Hack, in litt. 



Sheaths mostly sparingly long-hirsute; leaves scabrous or sometimes sparingly hir- 

 sute above; spikes 1 to 2 cm. long; spikelets 6 to ,7 mm. long, otherwise as in the 

 species. 



Type collected by S. M. Tracy, No. 3891, Biloxi, Mississippi, October 31, 1897. 



Specimens EXAMINED. — Florida: Apalachicola, A. W. Chapman; McDonald, Orange 

 Co., 57 C. H. Baker, November, 1897. Mississippi: Biloxi, 3892, 3900 S. M. Tracy, 

 October, 1898; Columbus, 2954 S. INI. Tracy, October, 1895. 



ANDROPOGON BAKERI sp. nov. (Fig. 14.) 



A tall, stout perennial, with the short spikes borne on long, slender peduncles; 

 Culms 10 to 11 dm. high, smooth or slightly roughened below the upper nodes, 

 lower internodes strongly compressed, the ujaper terete; sheaths much longer 

 than the internodes, loose, smooth or sj^arsely hirsute, the lower compressed, 

 keeled, equitant, the upper inclosing the bases of the panicles; ligule mem- 

 branous, 1 mm. long, fringed with short bristles; leaf- blades 2 to 4 dm. long, 5 

 to 7 mm. wide, flat, smooth below, somewhat scabrous above. Panicle about 

 2.5 cm. long, with slender, appressed or somewhat spreading branches, 3 to 4 

 at each node; joints of the primary branches 3 to 4, secondary 2 to 3, and ter- 

 tiary usually 1. Spathes 4 to 5 cm. long, green, acuminate, exceeding or some- 

 what shorter than the racemes. Racemes two, 1.5 to 3 cm. long, 3 to 6 flowered; 

 rachis slender, internodes somewhat clavate, 4 mm. long, shorter than the spike- 

 lets, densely clothed with long, silky, white hairs, exceeding the internodes in 

 length. Sessile spikelets yellowish, linear-lanceolate, 5 mm. long;. callus barbate 

 with white hairs 2 nun. long; first glume smooth or the keels minutely scabrous, 

 bifid at the apex, 5 mm. long; second glume firm, keeled, scabrous on the keel, 

 4.5 nun. long, bidentate at apex; third glume hyaline, acuminate; fourth glume 

 hyaline, acuminate, bifid at the apex, and bearing a straight, slender awn 7 to 

 10 mm. long. Grain fusiform, plano-convex, acute at apex, 3.5 nun. long, tipped 

 with the persistent style. Sterile pedicel about 7 mm. long, erect, densely 

 clothed with long white hairs; sterile spikelet entirely wanting. 



Type collected in pine lands at Grasmere, Florida, 58 C. H. Baker, November 13, 1897. 



39 



