GBAMIKEAE. 41 



22. MUHLENBEKGIA Schreb. 



Panicle contracted, narrow, spike-like, the short branches rarely spreading. 

 Flowering scale not awned, but sometimes awn-pointed. 



Outer scales not awned, about half as long as the flowering scale, 

 acute. 1. M. soiolifera. 



Outer scales long-acuminate, awn-pointed or awned. 



Outer scales about equal in length to the flowering scale, sharp- 

 pointed, about 3 mm. long. 2. M. Mexicana. 

 Outer scales exceeding the flowering scale, generally twice its 

 length, awned, about 5 mm. long. 3. M. racemosa. 

 ' Flowering scale long-awned; awn usually twice the length of the scale, 

 sometimes shorter. 

 Outer scales about equalling the flowering scale. 4. M. sylvatica. 

 Outer scales one-half to two-thirds as long as the flowering scale. 



5. M. temiiflora. 

 Outer scales less than one-third the length of the flowering scale. 



6. M. diffusa. 

 Panicle open, its branches long and spreading. 7. M. capillaris. 



1. MuHLENBERGiA SOBOLIFERA (Muhl.) Trin. M. p. 99. Rocky woods. Late 



summer. 



Philadelphia— Byherrj, Mart. (B.. C), Wissahickon (VP.). Bucks— 

 Sellersville (Fr.). Montgomery — IjSif&jette, Schuylkill Valley (VP.). 

 Delaware— (1^.). Chester— {V.). Lancaster— {V.). Northampton— 

 Easton, Porter (B. C). 



Sunterdon—MilioxA. (C). 



New Castle— Brandywine, etc. Frequent. 



2. MuHLENBERGiA Mexicana (L.) Trin. M. p. 99. Low ground. Late 



summer. 



3. MUHLENBERGIA RACEMOSA (Michx.) B. S. P. M. p. 99. Bogs and wet 



rocks. Late summer. 

 Sitci-s— Durham, jR*Ht/i (Fr.). Chester— (P.). Lancaster— (P.). 



4. Muhlenbergia sylvatica Torr. M. p. 100. Low or rocky woods. Late 



summer. 

 Philadelphia— (P.) . Buds— SeWersyiWe (Fr.). Delaware— Concord 

 (W. Tr.). Chester— (P.). Lancaster— (P.). Lehigh— Salshurg (Kr.). 

 Northampton — (P.) . 



GloucesterSvredeshoTo (Li.). iTunierdon— Clinton (Te.). 

 New Castle— Freqaent. 



5. Muhlenbergia tenuiflora (Willd.) B. S. P. M. p. 100. Rocky woods. 



Late summer. 



Philadelphia— Wissahickon (He.). J?wc^"S— Haycock (Fr.). Delaware 

 — Hey's Dam, Springfield, Dr. Geo. Smith (Fu.), Concord (W. Tr.), 

 Lewis Mill, Crum Creek (VP.). Chester— {P.). Lancaster— York Fur- 

 nace (He.). Northampton— Plaston, Porter (B. C). 



Neiv CasiZe— Frequent. 



G. Muhlenbergia DIFFUSA Willd. Drop-seed, Nimble Will. M. p. 100. Dry 

 hills and woods. Late summer. 



7. Muhlenbergia capillaris (Lam.) Trin. Hair-grass. M. p. 100. Dry 

 sandy soil. Autumn. 

 Lancaster— GaTp (P.). 



