472 Bicknell : Ferns and flowering plants of Nantucket 



backward one and that in May and June the island suffered from 

 a protracted drought. My explorations found the ponds lower 

 and the bogs drier than the experience of other years had ever 

 found them to be, even at the end of summer. 



GRAMINEAE (concluded) 



In Part II. it was said that the number of grasses known to 

 occur on Nantucket, exclusive of several well-marked varieties, 

 was one hundred and four. This number may now be increased 

 to one hundred and seventeen. Three common species unaccount- 

 ably omitted from Part II. are here added. 



Calamagrostis canadensis (Michx.) Beau v. 



In bogs everywhere ; panicles dried by the end of August. 



Calamagrostis cinnoides (Muhl.) Scribn. 



Somewhat local but rather widely distributed ; most common 

 in the neighborhood of Tom Never's Swamp and in the " Woods." 

 In full flower through late August and September. 



Ammophila arenaria (L.) Link. 



Abundant, occurring in sandy places all over the island, even 

 on Saul's Hills. In full flower through August and September. 



Extreme forms of this grass show a marked divergence in the 

 characters of the spike and flowers. The spike may be long and 

 tapering, 3.5 dm. long and 1.5 cm. thick, the spikelets with 

 narrowly attenuate and acute outer glumes becoming 1.5 cm. m 

 length ; or it may be linear-cylindric, the outer glumes puberulent, 

 much less gradually attenuate, acutish or obtuse, and only 7-1° 

 cm. long. 



*Alopecurus geniculatus L. 



Frequent in wet places in the meadows north of the town an 

 along damp sandy cartways below the "Cliff." Just in & 



This is the introduced plant as distinguished from the native 

 A. aristulatus of Michaux. The latter plant seems to have been 

 well understood by some of the fathers of our botany but to have 

 almost fallen from recognition of late years. I do not think there 

 need be any doubt that it is worthy of its old position. « ,s a 

 more delicate grass than A. geniculatus and offers an immediate 

 contrast by its glaucous character and paler green color. « ' 



