220 REPORT OF NEW JERSEY STATE MUSEUM. 



MUHLENBERGIA Schreber. 



Key to the Species. 



a. Panicle purplish, open and diffuse, each spikelet on a filiform pedicel and 

 with a hair-like awn. M. capillaris, p. 221 



aa. Panicle contracted, spike-like or exceedingly slender and appresscd, culms 

 branched. 



b. Flowering scales not awned. M. mexicana, p. 220 



bb. Flowering scales awned. 



c. Panicles not dense and cylindrical. 



d. Outer scales equal in length to the flowering scale. 



M. sylvatica, p. 220 

 dd. Outer scales about two-thirds as long as the flowering scale. 



M. tenuMora, p. 221 

 ddd. Outer scales minute, less than one-third as long as the flower- 

 ing scale. M. diffusa, p. 221 

 cc. Panicles dense and cylindrical, spike-like. M. foliosa, p. 220 



Muhlenbergia foliosa Trin. Leafy Muhlenbergia. 

 Muhlenbergia foliosa Trinius, Gram. Unifl. 190. 1824 [Pennsylvania]. 



Bogs of the Middle district; rare (probably also northward), 

 only known from Lindenwold, where it was discovered by the 

 writer September 20, 1910, and was fairly plentiful in good con- 

 dition. 



Fl. — Late August to early October. 

 Middle District. — Lindenwold. 



Muhlenbergia mexicana (L.). Meadow Muhlenbergia. 



PI. VII., Fig. 3. 



Agrostis mexicana Linnaeus, Mant. I. 31. 1767 [America]. — Barton, Fl. 



Phila. I. 42. 1818. 

 Muhlenbergia mexicana Knieskern 27- — Britton 287. 



Throughout the northern counties; south locally in the Mid- 

 dle district and on the coast. 



Fl. — Mid-August to late September. 



Middle District. — New Egypt, Birmingham, Delair, Swedesboro. 

 Coast Strip. — Barnegat. 



Muhlenbergia sylvatica (Torr.). Wood Muhlenbergia. 



Agrostis sylvatica Torrey, Fl. U. S. I. 87. 1824 [Mountains of N. J.]. 

 Muhlenbergia sylvatica Knieskern 27- — Britton 287. 



