190 Bicknell: Ferns and flowering plants of Nantucket 



pubescent with more densely bearded nodes but in respect of pu- 

 bescence the plant is extremely variable even in the same locality, 

 as I have repeatedly observed on Long Island, where the species 



is common. 



Chaetochloa glauca (L.) Scribn. 

 Common in cultivated fields and about the wharves and streets. 



* Chaetochloa versicolor Bicknell. 



A characteristic grass of the borders of salt marshes. 



Chaetochloa viridis (L.) Scribn. 



Rather common, mostly near cultivated ground. 



Chaetochloa italica (L.) Scribn. 

 A few plants in an old field near the town in 1 899 — the smaller 

 purple-awned form. 



* Cenchrus tribuloides L. 



Scattered over a sandy level near an abandoned barn at Shaw- 

 kemo Spring, Sept. 11, 1907. Perhaps introduced. 



ZlZANIA AQUATICA L. 



Considerable growths of this grass are established on the 

 borders of head of Hummock Pond; Miacomet Pond, 1899. 

 Leaves 1.5-3 cm - w *de ; branches of pistillate part of inflorescence 

 either ascending or appressed. 



Mrs. Owen says " Probably all introduced from seed sown 

 about 1875/' 



Homalocenchrus oryzoides (L.) Poll. 



Common in low ground. 



Anthoxanthum odoratum L. 



Common and widely spread ; inflorescence completely dried. 



* Savastana odorata (L.) Scribn. 



Common in salt marshes along the " Creeks"; sterile culms and 

 leaves green, the fertile culms withered, often with persisting 

 panicles. 



Aristida dichotoma Michx. 

 Very common in sterile soil. 



* Aristida gracilis Ell. 



Damp roadside west of the town, 1904. 



