14 Rhodora [ JANUARY 
and distorted; either sessile or terminal on a branch of one to many 
cells. Unilocular sporangia unknown. 
Fucus vESICULOSUS forma gracillima Collins. Among Spartina, 
etc., on muddy bank between tide-marks, Eastham, Massachusetts, 
September, 1888. No. 578. With oospores. A very slender form, 
without vesicles, and with receptacles linear to filiform. It is probably 
only a growth form, but unlike most of the dwarf forms of this species, 
it fruits freely. 
THE WALKING-FERN IN WORCESTER CoUuNTY, MASSACHUSETTS. — In 
the October issue of RHODORA (p. 181.) Mr. T. O. Fuller reports the 
occurrence of Camptosorus rhizophyllus, Link, at Needham, only a 
few miles from Boston. He quotes also a statement that this is the 
only reported station for this local and highly characteristic fern east 
of Mt. Tom, or more properly of Mt. Toby. However, although 
hitherto unrecorded in print, there is a station in Worcester County in 
the town of Brookfield. At this place the species is scarce and grows, 
as usual, in crevices of rock, with every appearance of an indigenous 
plant. This new and intermediate station although only a few miles to 
the eastward of Mt. Toby, still diminishes somewhat the gap between 
the previously known stations, and therefore renders the indigenous 
nature of the Needham occurrence a little more probable. 
In connection with the Camptosorus, I may mention another fern, 
which is extremely local in Massachusetts, namely, 7PeZaea atropur- 
purea, Link. This is given in the Amherst Catalogue only as occurring 
at Mt. Toby. It has, however, been found sparingly at a solitary 
station in the town of Berlin, Worcester County, growing upon a ledge 
containing a small percentage of lime which is characteristic of cer- 
tain parts of the Nashua Valley formation. It is interesting to note 
in connection with the occurrence of this species at Berlin, the rela- 
tionship of the substratum to its distribution. — G. E. STONE, Agricul- 
tural College, Amherst, Massachusetts. 
