FLORA OF WASHINGTON AND VICINITY. 131 



Alopecurus geniculatus, L., var. aristulatus, Steud. Synopsis Plantarum glumace- 

 arum, 147, 5. [J. aristulatus, Michx.] Wild Foxtail Grass. 



\Phleuxa pratensejli. Timothy. Herd's-Grass (of New England). 

 June. 



Vilfa aspera, Beanv. Eush-Grass. 



Little Falls (Dr. Vasey, 1874). 



Agrostis perennans, Tuckerm. Thin Grass. 

 August, September. 



Agrostis scabra, Wilkl. Hair-Grass. 



Last of May or first of June. 



Agrostis vulgaris, With. Red-top. Herd's-Grass (of PennBylvania). 

 Middle of June to middle of July. 



Agrostis alba, L. FiORiN. White Bent-Grass. 

 Last of Juno and through July. 



Cinua arundinacea, L. Wood Reed-Grass. 



August, September. 

 Muhlenbergia sobolifera, Trin. Drop-seed Grass. 



Rock J' Woods, not rare (Dr. Vasey). 



Muhlenbergia Mexicana, Trin. 

 September. 



Muhlenbergia sylvatica, Torr. & Gray. 



September. 



Muhlenbergia "Wllldenovii, Trin. 

 July, August. 



Muhlenbergia diffusa, Schreb. Nimble-Will. 



Sejitember. 



Muhlenbergia capillaris, Kunth. Hair-Grass. 



Once found, September 26, 1875, at Great Falls ; not seen since. 



Brachyelytrum aristatum, Beauv. 

 Last of July or first of August. 



Calamagrostis Nuttalliana, Steud. Reed Bent-Grass. 

 First half of September. 



Stipa avenacea, L. Black Oat-Grass. 



Last of May or first of June. * 



Aristida dichotoma, Michx. Triple-awned Grass. Poverty-GraSS. 



Sandy places (l^r. Vasey). 



t Aristida gracilis. Ell. 



Last of September or first of October. 



Aristida oligantha, Michx. 

 Last of September. 



