128 MIDDLESEX FLORA. 



D. Nuttalliana, Vasey. (Calamagrostis Nuttalliana, Steud., Man.) 

 Frequent. 



Deschampsia, Beauv. 



D. flexuosa, Griseb. (Aira flexuosa, L., Man.) Hair Grass. 



Frequent . 

 D. caespitosa, Beauv. (Aira caespitosa, L., Man.) Tufted Hair 



Grass. 



Lowell and Chelmsfoi'd (Dr. C. W. Swan). 



HOLCUS, L. 



H. LANATus, L. Velvet Grass. 

 Kather common. Nat. from Eu. 



AVENA, L. 



A. striata, Michx. Purple Wild Oat. 



Concord (E. S. Hoar; specimen in herb. of). 

 A. satim, L. Common Oat. 



Frequently escaped by roadsides and in waste places. Adv. from 



Eu. 



Arrhenatherum, Beauv. 



A. AVENACEUM, Beauv. Tall Oat Grass. 

 Concord (E. S. Hoar); Waltham List; Medford (L. L. Dame). 

 Nat. from Eu. 



Danthonia, DC. 



D. spicata, Beauv. Wild Oat Grass. 

 Common. 



D. compressa, Austin. Mountain Oat Grass. 

 Not uncommon. 



" Differs from D. spicata in forming a compact sod, by having 

 more numerous and larger leaves, by a larger, longer and spreading 

 panicle, and by the longer, more slender awn-pointed teeth of the 

 flowering glumes." Vasey, Ag. Grasses of the U. S. 



Eleusine, Gaertn. 



E. Indica, Gaertn. Dog's Tail Grass. Wire Grass. 



Lowell, '-dumps" (Dr. C. W. Swan) ; Maiden, near mill (F. S. 

 Collins). Here probably adventive from the South, where it is 

 naturalized from India. 



Leptochloa, Beauv. 



L. mucronata, Kunth. 

 Lowell "dumps" (Dr. C. W. Swan); Maiden, Goulding's Mill (F. 

 S. Collins). Adv. from the West. 



