258 
Dichanthelium —— (Schultes) Gould, p. 220 
es [S: Panicum oligosanthes Schultes var. 
aetna (Gould, 1974) 
var. scribnerianum (Nash) Gould [S: Panicum oligosanthes 
var. helleri (Nash) Fern., var. scribnerianum (Nas 
ern.; M: D. oligosanthes var. helleri (Nash) Mohl.] 
Gould, 1974; Gould and Clark, 1978) 
D. ravenelii (Scribner & Merr.) Gould [S: Panicum ravenelii 
Scribner & Merr.] (Gould, 1974), p. 221 
*D. sabulorum (Lam.) Gould & C. A. Clark, p. 232 
var. thinium (A. Hitchc. & Chase) Gould & C. A. Clark [S: P. 
columbianum Scribner] (Gould and Clark, 1978; 
Nelson, 1982) 
D. scoparium (Lam.) Gould [S: Panicum scoparium Lam.] (Gould, 
1974), p. 221 
D. sphaerocarpon (Elliott) Gould, p. 218 
var. isophyllum (Scribner) Gould & C. A. Clark [S: Panicum 
polyanthes Schultes, M: D. polyanthes (Schultes) 
Mohl.] (Gould and Clark, 1978) 
var. sphaerocarpon [S: Panicum sphaerocarpon Elliott, incl. 
var. inflatum (Scribner & J. G. Smith) A. Hitchc. & 
Chase] (Gould, 1974) 
DIGITARIA, crab gra 
[S: incl. LEPTOLOMA] (Veldkamp, 1973) 
+Digitaria ciliaris (Retz.) Koeler, crab grass, gel big 
S: D. sanguinalis (L.) Scop. var. 
(Retz.) Parl.] (Gould, 1963; Webster, 198) p. 194 
D. cognata (Schultes) Pilger, fall witch grass [S, 
Leptoloma cognatum (Schultes) Baie (Veldkamp, 
si p. 197 
var. cognata 
D. a (L) Koeler, slender crab grass, p. 196 
var, cere (Walter) Fern., hairy finger grass [G: D. filiformis; 
M: D. villosa (Walter) Persoon] (the relationship of 
this taxon, which is often treated as a separate species, 
to D. filiformis has not been studied in detail) 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
