﻿336 Bickxell: Ferns and 



ness of outline may be sharply accentuated by a more prominent 

 tooth here and there standing forth quite out of line with its 

 fellows either at right angles to the axis of the leaf or actually 

 recurved. 



The plants of these coastal islands compared with those of more 

 hilly country inland show a marked tendency toward a different 

 form of corolla, the tube wider, even campanulate, with its upper 

 lip abbreviated and with short rounded lobes, much like that of 

 the western S. occide?itaHs, to which this species is evidently very 

 closely related. 

 Gratiola aurea Muhl. 



Abundant on wet shores and in low grounds, as well as in 

 many fresh water ponds, where it develops after the manner of a 

 true aquatic producing lengthened and attenuate semi-pellucid 

 leaves. Your\g plants beginning to appear May 30, 1909, and 

 June 8, 1910; mostly less than one inch high June 17, 1910-; in 

 full flower August 7, 1906, and until after the middle of September. 

 On Martha's Vineyard I have seen it in flower as early as June 26 

 (191 3) and as late as October 8 (1909). 

 Ilysanthes dubia (L.) Barnhart. 



Ilysanthes gratioloides Benth. 



Infrequent. Shores of Sachacha Pond; at several stations 

 near Siasconset; Maxcy's Pond; pool on Madequet road. Still 

 in flower September 12, 1907, September 16, 1899. 



LiMOSELLA TENUIFOLIA Hoffm. 



Abundant on the wet sandy shores of ponds on the south side 

 of the island, especially Hummock Pond; also at Sachacha Pond. 

 Here, and at Miacomet Pond, it may be seen growing beneath the 

 water with elongated attenuate leaves, some of them 10 cm. or 

 more in length. Ordinarily the leaves are mostly 2-4 cm. long 

 and very narrowly linear, either obscurely spatulate or tapering 

 to an obtuse tip. Not yet in flower May 31, 1909; in full flower 

 June 17, 1908, continuing in bloom through September. 

 ♦Veronica officinalis L. 



A small patch in full flower on a lawn on Main Street, June 16, 

 1911, doubtless introduced. 



