﻿32 Bicknell: Ferns and flowering plants of Nantucket 



on the stem, actually ovate, are broadly sessile or subclasping. 

 It is also worthy of remark that the leaves of S. campanulata, 

 although the more fleshy in life, become more membranous in the 

 dried specimen and more distinctly reticulate-veined. 

 Bartonia virginica (L.) BSP. 



Bogs and low grounds, also on the dry plains towards the 

 south shore. Plants three inches high June 29, 191 2; in full 

 flower August 6, 1906, continuing in bloom through September. 

 The corolla is subject to a noteworthy degree of variation both in 

 size and form, its lobes varying from either broadly or narrowly 

 oblong to spatulate, from entire to denticulate, and from truncately 

 obtuse to mucronulate, or even tapering acute; anthers yellow, 

 mucronulate, about i mm. long; capsule 4-6 mm. long, 2-3 mm. 

 wide, remaining united at the apex, and septicidal below the 

 undivided stigma. In the two following species the capsule splits 

 into more or less spreading valves. 



There is a late season form of Bartonia virginica that differs 

 strikingly in appearance from the commoner form of the plant 

 especially in its earlier flowering stage ; the broadened lobes of the 

 corolla have become rose purple, sometimes of an actually bright 

 shade nearly throughout, and the enlarged ovoid capsule, 2.5-3 

 mm. in diameter, has by its increased width dilated the stigma to 

 a broadly pyramidal instead of the usual columnar form. In cold 

 sphagnum bogs a very small and delicate few-flowered, form is 

 sometimes found in which the cauline bracts, and even the flowers, 

 are alternate. 



* Bartonia paniculata (Michx.) Robinson. 



Occasional or frequent in damp or wet shaded thickets, straying 

 out into open bogs; locally common about the borders of Tom 

 Never's Swamp. In full flower August 31, 1904, continuing in 

 bloom through September. Corolla white, 3-4 mm. long, the 

 lobes lanceolate and acuminate to ovate-oblong and acute; 

 capsule ovoid, 3-4 mm. long. 



* Bartonia iodandra Robinson. 



This little known plant described from Nova Scotia by Dr. 

 B. L. Robinson, in 1898, proves to be also a plant of Nantucket, 

 where it shows clearly the characters that Dr. Robinson has 



