60 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
NYMPHAEA ADVENA Ait. 
Mrs. Owen’s catalogue reports the spatterdock as not uncom- 
mon. I saw nothing of it nor did I succeed by inquiry among the 
islanders in ascertaining where it grew or had once grown. Since 
then, however, a letter from Mrs. Mary A. Albertson, Curator of 
the Nantucket Maria Mitchell Association, has informed me that it 
has been found by Miss Grace B. Gardner and by Mr. Walter 
Burdick in a little cove at the east end of Sachacha Pond. 
CASTALIA ODORATA (Ait.) Woodville & Wood. 
Common. Just in bloom June 17, 1908; observed still in 
flower as late as the middle of September. 
A colony of pond lilies bearing large bright pink flowers was 
found in Squam, Aug. 13, 1906, in a small deep pool almost 
hidden by surrounding shrubbery. The locality is in an unin- 
habited part of the island and the plants had every appearance 
of being native, but I have been informed by Mrs. Albertson that 
the pink pond lily is known to have been planted somewhere in 
that section of the island. 
CERATOPHYLLACEAE 
CERATOPHYLLUM DEMERSUM L. 
Abundant in Long, Hummock, and Miacomet ponds ; Wash- 
ing Pond. Not observed in flower or fruit. 
RANUNCULACEAE 
Copris TRIFOLIA (L.) Salisb. 
The goldthread is included without comment in Mrs. Owen’s 
catalogue. When on Nantucket I was not able to learn anything 
of the status of the species as an island plant and concluded that 
if it should possibly occur at the present day it must be extremely 
rare. I have since heard from Mrs. Albertson that she had 
recently been told by Miss Grace B. Gardner that it had been 
found by her in the “thorn lot.” The reference is to the tract of 
land west of the town bordered by cockspur thorn trees which, 
Mrs. Owen has told us, were set out as a hedge about the year 
1830. 
