BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 83 
the plant the carpels, about 1.25 mm. long, were prominently 
tuberculate or minutely papillose-roughened, often with a smooth 
dorsal space between two indistinct ridges. Occurs on Tuckernuck. 
ARALIACEAE 
ARALIA NUDICAULIS L. 
Not .common and found only in the dense thickets on the 
eastern side of the island from Shimmo to Polpis, Pocomo and 
Squam; also at Tom Nevers Swamp, and on Tuckernuck. Just in 
flower June 2, 1909. 
UMBELLIFERAE 
HYDROCOTYLE UMBELLATA L. 
One of the most common aquatics of Nantucket having found 
its way into almost all of the fresh water ponds and pools. Also 
on Tuckernuck. The floating leaves begin to appear by the end 
of May. In full flower and fruit through September. 
* SANICULA MARYLANDICA L. : 
This is one of the plants of Nantucket that have been found 
only at a single spot. On July 4, 1912, I came upon a thriving 
colony of about fifteen plants hidden in the seclusion of a thicket 
in Squam not far east of Watts Run; they were in full flower and 
well set with young fruit. This species is frequent in the thickets 
of Chappaquiddick Island, Marthas Vineyard. 
* SANICULA CANADENSIS L. 
Also found only at a single station, and only one plant. It 
grew at the border of a thicket in Squam towards Wauwinet, Aug. 
13, 1906, a well-fruited plant nearly 9 dm. high. It is scarcely 
to be doubted that other plants are to be found among the exten- 
sive and almost impenetrable thickets in that part of the island 
although I have not succeeded in rediscovering it. It occurs on 
Marthas Vineyard and I know of a single colony on Chappaquid- 
dick Island. 
* CONIUM MACULATUM L. 
Occasional in waste ground about the wharves and in the out- 
skirts of the town. Some plants were already neatly five feet 
tall June 4, 1911, the umbels still close and green. In full flower 
June 29, 1912. 
