560 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



(fig. 1169). A form with glabrous spikelets from Manchester, N.H., 

 has been described as D. laeviglumis Fernald (fig. 1168, B). 



9. Digitaria villosa (Walt.) Pers. (Fig. 1170.) Perennial at least 

 in the Southern States, in large tufts, purplish at base; culms 0.75 to 

 1.5 m tall, rarely branching; sheaths, at 

 least the lower, grayish villous, some- 

 times sparsely so; blades elongate, 3 to 

 6 mm wide, often flexuous, from softly 

 pilose to nearly glabrous; racemes 2 to 

 7, narrowly ascending, rarely somewhat 



spreading, very 



slender, usually 15 



to 25 cm long, 



rather distant, 



often naked at 



base, sometimes 



interrupted; spike- 



tn 9 



FIGURE 1169. Distribution of 



Digitariafiliformis. ,, , 



long, usually dense- 



ly pubescent with soft capitellate hairs, 

 the hairs longer than in D.filiformis, and 

 sometimes only obscurely capitellate, the 

 spikelets otherwise very like those of PIGTTRE im ._ Digitaria villosa . Plant , 



D. fillJOrmiS. VI Sandy fields and X 1; spikelet and floret, X 10. (Curtiss 



woods, Maryland to Missouri, south to 300> F1 



Florida and Texas; Cuba, Mexico (fig. 1171). This species and D. 



filiformis seem to intergrade to some extent. Plants from penin- 



sular Florida with less strongly pubescent sheaths, 2 to 4 elongate 



racemes, and spikelets with longer hairs 



have been distinguished as D. leucocoma 



(Nash) Urban. 



10. Digitaria panicea (Swartz) Urban. 

 (Fig. 1172.) Resembling D. villosa, but 

 more slender; blades folded or involute, 

 flexuous, about 1 mm wide; racemes 

 ___ mostly 1 to 3, 



erect, 5 to 20 cm 



long, usuaUy 10 



to 15 cm, very 



slender, loosely 



flowered ; spike- 



lets about 1.5 mm 



FIGURE im.-Distribution of i on cr the capitel- 



Digitana villosa. 1,1 ,1 



late hairs rather 



stiff and appressed. 01 Moist pine 

 barrens and open ground, southern Flor- 

 ida; West Indies, Brazil. 



11. Digitaria gracillima (Scribn.) 

 Fernald. (Fig. 1173.) Perennial in FlGURE U72 .-Digitaria panicea. Plant, 



dense tufts; Culms 60 to 100 Cm tall, X g l; spikelet and floret, X 10. (Tracy 



erect; lower sheaths appressed- villous; 



blades elongate, 1 to 2 mm wide, often involute, more or less 

 flexuous; racemes mostly 2 or 3, distant (rarely as many as 5 

 and fairly approximate), very slender; spikelets rather remote, 



