MANUAL OF THE GRASSES OF THE UNITED STATES 665 



obovate-elliptic, densely hirsute to glabrous, o — Open sandy or 

 stony ground, or in cultivated soil, western Texas to southern Cali- 

 fornia; introduced in North Carolina, South Carolina, Florida, and 

 Mississippi; Mexico (fig. 1477). 



118. Panicum texanum Buckl. Texas millet. (Fig. 1478.) 

 Culms erect or ascending, often decumbent and rooting at the lower 

 nodes, 50 to 150 cm or even to 3 m long, softly pubescent at least 

 below the nodes and below the panicles; sheaths softly pubescent, 

 often papillose; blades 8 to 20 cm long, 7 to 15 mm wide, softly pubes- 

 cent; panicle 8 to 20 cm long, the branches 

 short, appressed, loosely flowered, the axis and 

 rachises pubescent, with long hairs intermixed ; 

 spikelets 5 to 6 mm long, fusiform, pilose, often 

 obscurely reticulate. O — Prairies and open 

 ground, especially on low land along streams, 

 often a weed in fields, Texas ; introduced at sev- 

 eral localities, North Carolina to Florida and 

 Oklahoma; Arizona; northern Mexico (fig. 1479). 

 4. Dichotomiflora. — Somewhat succulent branching annuals; blades 



flat, panicles many-flowered, the branclilets short and appressed 

 along the rather stiff main branches; spikelets short-pediceled, 

 7-nerved, glabrous; first glume short, broad; fruit smooth and 

 shining. 



119. Panicum dichotomiflorum Michx. Fall panicum. (Fig. 

 1480.) Culms ascending or spreading from a geniculate base, 50 to 



Figure 1479. — Distribution of 

 Panicum texanum. 



Figure 1480.— Panicum dichotomiflorum. Panicle, X I; two views of spikelet, and floret, X 10. 



(Deam, Ind.) 



100 cm long, or in robust specimens as much as 2 m long; ligule a 

 dense ring of white hairs 1 to 2 mm long; blades sometimes sparsely 

 pilose on the upper surface, 10 to 50 cm long, 3 to 20 mm wide, the 

 white midrib usually prominent; panicles terminal and axillary, 

 mostly included at base, 10 to 40 cm long or more, the main branches 

 ascending; spikelets narrowly oblong-ovate, usually about 2.5 mm 

 long, acute. O Moist ground, along streams, and a weed in waste 

 places and cultivated soil, Maine to Nebraska, south to Florida and 

 Texas, occasionally introduced further west; here and there in the 

 West Indies (fig. 1481). Panicum dichotomiflorum var. puritano- 

 rum Svenson. Differing in the shorter, more slender culms and 



