1899] Rand,— Subularia aquatica on Mt. Desert Island 155 
disposition of the northeastern species is now being attained. In view 
of this fact, it is perhaps appropriate that a summary of our knowledge 
of the distribution of these plants in New England should now be made. 
The check-list of species which follows on page 160 will show very quickly 
that in northern New England the genus An/ennaria reaches a greater 
development than further southward. Some of the species, however, 
now known only from the northern'states are to be expected from the 
other three, while a few forms may yet be expected in Maine, New 
Hampshire and Vermont. It is hoped that any information (especially 
it accompanied by specimens) which will further our understanding of 
these plants will be sent to the writer, who, so far as he is able, will 
gladly render assistance in the identification of species. 
Gray HERBARIUM. 
SUBULARIA AQUATICA ON Mr. DESERT IsLAND.— This small and 
easily overlooked aquatic crucifer is doubtless neither so rare nor so 
local in its distribution as has been commonly supposed. Stations 
where it is known to occur, however, are not yet so numerous, that 
a new one is without interest. In September, 1895, the late Edwin 
Faxon and I made a careful exploration of the shores of many of the 
ponds on Mt. Desert Island for /soetes and other water plants, hoping 
that Subularia also might reward our search ; and in fact we were suc- 
cessful in finding it in two of the ponds. It was growing both immersed 
on the sandy shores, and out of water in the mud among stones, and 
was at the time of collection, in flower as well as in fruit. At the station 
on Eagle Lake, the immersed plant was in great abundance. Com- 
paratively little of it grew in the clear sand, however, most of the colony 
being anchored in a great mat of "uncus militaris, Eriocaulon septangu- 
lare, and Lobelia Dortmanna. The economy of this manner of living may 
be readily understood when one notices how easily these little plants are 
uprooted from the sand by the waves at the time of low water. Only 
a few emersed plants were found, in fact all the plants here observed 
would be at least three feet under water the greater part of the year. 
Since the above observations were made, however, the level of the lake 
has been raised two to three feet, so that collecting at this station has 
become very difficult. 
At the other pond much the same habits have been observed. 
More plants, however, grow in the sand and gravel; and a number of 
4 
