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



long, about 2 mm wide; racemes 2 or 3, ascending or erect, 5 to 11 cm 

 long, the filiform rachis naked for 1 to 1.5 cm at base, or with distant 

 abortive spikelets; spikelets rather distant, elliptic, about 3.2 mm long, 

 glabrous; first glume minute with a hyaline erose margin; second 

 glume and sterile lemma finely nerved, as long as the grayish fertile 

 lemma. % — Pinelands, southern Florida. 



14. Digitaria subcalva Hitchc. (Fig. 1176.) Perennial; culms 

 tufted, slender, ascending from a curved base, 40 to 100 cm tall; 

 sheaths papillose-pilose; blades flat, scabrous, the lower pilose, 3 to 



Figure 1175.— Digitaria pauciflora. 

 Plant, X 1; spikelet and floret, X 

 10. (Type.) 



Figure 1176.— Digitaria subcalva. Plant, 

 X 1; spikelet and floret, X 10. (Type.) 



15 cm long 1 to 3 mm wide; racemes 2 to 4, narrowly ascending, 5 to 

 12 cm long, approximate, the rachis slender, triangular, mostly naked 

 at base for 1 to 1.5 cm; spikelets 2.5 to 2.8 mm long, acute; first glume 

 obsolete; second glume and sterile lemma slightly shorter than the 

 acute pale or drab fruit, the internerves from obscurely to distinctly 

 appressed silky-pubescent. 91 — Known only from Plant City, Fla. 

 15. Digitaria runyoni Hitchc. (Fig. 1177.) Perennial; culms 

 ascending, 40 to 70 cm tall, the base often long-creeping and rooting, 

 many-noded; sheaths densely villous or the upper glabrate; blades 

 flat, the lower densely velvety- villous, the upper sparingly pilose or 

 glabrous, mostly less than 10 cm long, 3 to 6 mm wide; racemes 5 to 10, 



