54. 
20 Billadeswe2memen wad Chote MOTO cvs lsvekeierareions suchen . P. clandestinum 
29. Blades less than 1 cm. wide. 
Expected (P. addisonii). 
28. Sheaths glabrous or puberulent. 
29. Spikelets spherical. (Also, blades 
cordate, white-margined). Expected 
(P. polyanthes). 
29. Spikelets ovate. 
30. Spikelets 2.3-3 mm. long. 
30. Spikelets less than 2 mm. long. 
Expected (P. columbianum). 
31. Culms glabrous or nearly so; 
blades 1.5 cm. wide or more....... P. commutatum 
31. Culms puberulent; blades not over 
1 cm. wide. Expected (P. ashei). 
Panicum dichotomiflorum Michx. 
Java Farm. One station: border of salt marsh on tidal portion 
of Muddy Creek. Associate species: Spartina alterniflora, Rumex 
verticillatus. Higman 290. 
P. capillare L. Old-witch Grass 
Java Farm. One station: small old field north of main buiding 
area. Hectare 2580. lLonicera japonica and Vitis vulpina dominant. 
Higman 539. 
P. virgatum L. var. spissum Linder Switchgrass 
Java Farm and Ivy Neck. Moderately abundant in salt marshes, 
especially the more inland parts. Associate species: Distichlis spicata, 
Pluchea camphorata, Spartina patens. Higman 89, 344, 440, 973, 1027, 
1050; W055. 
P. anceps Michx. 
Java Farm. Infrequent in woods between Muddy Creek and Phalaris 
arundinacea meadow, north of main building area. Canopy of Fagus 
grandifolia, Platanus occidentalis, and Quercus alba. Associate 
species: Lindera benzoin, Glyceria striata, Onoclea sensibilis, 
Duchesnea indica. Higman 181, 474, 1111. 
