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. mcxicaua 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 Bar- 

 rington, in disintegrated quartzite. 



O. racemosa (Sm.) Ricker. — Rocky woods, in rich soil; common 

 in the valley. Not noted on the plateau. 



PANICUM. Panic Grass. 



Key to Panicum. 

 a. Annuals. 



Panicle more than half tlio IcMi^th of the entire plant. 



P. capiUarc, var. occidcntale. 



Panicle not over onc-tiiinl the len^tli of the entire plant P. Tuckermani. 



a'. PerenniaLs. 



b. Ba.sal leaves similar to culm-leaves, not forming a winter rosette. 



/'. agrosloides. 

 b'. Basal leaves usually distinctly ililTereiit from tin* culm-leaves, forming 

 a winter rosette. 



