HOFFMANN: FLORA OF BERKSHIRE COUNTY. 217 
MILIUM. Millet Grass. 
M. effusum L. — Cool woods; rare. Summit of Greylock; 
ledges on Mt. Harvey, West Stockbridge. 
MUHLENBERGIA. Drop-seed Grass. 
M. foliosa Trin. — (M. mexicana 111. Fl. ed. 2 in part.) 
Moist thickets, dry banks and rocky ledges; frequent in the valley. 
Not noted on the plateau. 
M. MEXICANA (L.) Trin. — Sandy soil, gravelly shores, riverbanks, 
shaded roadsides; common. 
M. racemosa (Michx.) BSP. — Low meadows and marshes; com- 
mon in the valley. Not noted on the plateau. 
M. Schreberi J. F. Gmel. Drop-seed. — Dry woods and shaded 
roadsides; occasional. Stockbridge; Alford; New Marlboro. 
M. sobolifera (Muhl.) Trin. — Dry, rocky woods, New Marlboro. 
M. sylvatica Torr. — {M. umbrosa 111. Fl. ed. 2.) 
Rocky or swampy woods; frequent. Both the awnless and the 
long-awned forms occur. Not noted on the plateau. 
M. tenuiflora (Willd.) BSP. — Rocky woods; frequent. Not 
noted on the plateau. 
ORYZOPSIS. Mountain Rice. 
O. asperifolia Michx. — Dry wooded banks and alluvial thickets; 
frequent in the valley; occasional on the plateau. 
O. pungens (Torr.) Hitchc. — Top of Monument Mt., Great Har- 
rington, in disintegrated quartzite. 
O. racemosa (Sm.) Ricker. — Rocky woods, in rich soil; common 
in the valley. Not noted on the plateau. 
PANIC UM. Panic Grass. 
Key io Paiiicuvi. 
a. Annuals. 
Panicle more than half the lonptli of the entire plant. 
/*. capillare, var. occidentale. 
Panicle not over one-third the length of t lie (>iitiro plant . . . P. Tuckcrtnani. 
a'. Perennials. 
b. Basal leaves similar to culm-loaves, not forminji a winter rosette. 
P. agrostoides. 
b'. Basal leaves usually distinclly (litTcrcnt from tlic culm-loaves, forming 
a winter rosette. 
