60 Bicknell : Ferns and flowering plants of Nantucket 



two plants covered nearly the entire surface of Capaum Pond and 

 on Sachacha Pond formed a continuous zone around the borders, 

 extending certainly from fifty to one hundred yards out from the 

 shore. In 1907 there was little surface indication of the plants in 

 either pond. Both species fruit freely. 



Ruppia maritima L. 



Common in salt and brackish ponds and ditches. In mature 

 fruit in the ponds, September, 1 904; in a tidal ditch on Swain's 

 Neck it was just in flower Sept. 17, 1907. 



Zannichellia palustris L. 



Recorded from Hummock and Miacomet ponds and from 

 Polpis. I did not meet with it. 



Naias flexilis (Willd.) R. & S. 



Found only in a small pool on the north side of Trot's Swamp 

 Sept. 10, 1904, the specimens bearing mature fruit. Recorded 

 by Mrs. Owen only from Long Pond on authority of Mr. Moron 



g- 



Naias guadalupensis (Spreng.) Moron g. (N. mkrodon A. Br.?) 



First detected Sept. 8, 1904, in Miacomet Pond, where frag- 

 ments were found floating in the shallow water and cast up along 

 the shore with other detached aquatic plants along the eastern 

 border of the pond, the leeward side on that day. The high 

 water roughened by a strong wind made it impossible to detect 

 the rooted plant, nor could it be discovered in actual growth on 

 Aug. 11, 1906, when it was found as before under conditions of 

 wind and water almost the same. 



907 



the muddy 



bottom of a shallow inlet of Long Pond at the " Gut," and on 

 Sept. 20th it was again found in Miacomet Pond, this time grow- 

 ing in abundance in mud and mud overlaid with sand in shallow 

 water along the west shore. These ponds extend in a general 

 northeast and southwest direction and each is separated from the 

 ocean on the south shore only by a strip of sandy beach which is 

 probably not always an effectual barrier to the sea. Miacomet 

 is a narrow pond less than a mile long ; Long Pond is over three 

 and a half miles in length and nearly bisects the extreme western 

 quarter of the island. The point where this Naias was found in 





