Shafer : Vascular Flora of Allegheny County. 119 



MUHLENBERGIA Schreber. 



* M. Mexicana (Linnaeus). Meadow muhlenbergia. 



f M. tenuiflora (Willdenow). Slender muhlenbergia. 



* M. diffusa Schreber. Dropseed grass, 



BRACHYELYTRUM Schreber. 

 f B. erectum (Schreber). Brachyelytrum. 



PHLEUM Linn^us. 



* P. pratense Linnaeus. Timothy. 



ALOPECURUS Linnaeus. 



* A. pratensis Linnaeus. Meadow foxtail. 



SPOROBOLUS R. Brown. 



* S. vaginaeflorus (Torrey). Rush-grass. 



AGROSTIS Linn^us. 



* A. alba Linnaeus. Red-top. 



f A. perennans (Walter). Thin-grass. 



f A. hyemalis (Walter). Hair-grass. 



CINNA Linnaeus, 

 f C. arundinacea Linnaeus. Wood reed-grass. 



ARRHENATHERUM Beauvois. 

 f A. elatius (Linnaeus). Oat-grass. 



HOLCUS Linn^us. 



* H. lanatus Linnaeus. Velvet-grass. 



