184 Rhodora [OCTOBER 
the presence of several plants, usually occurring in limestone regions, 
such plants as Clematis verticillaris and Arenaria stricta. It is also 
characterized by such southern types as Asplenium Trichomanes, 
Quercus coccinea and Pinus rigida. The vegetation of the Squam 
range, lying a mile to the westward and composed of schists, is strik- 
ingly different. The boundary between Grafton and Carroll Counties 
runs across the eastern summit of Rattlesnake Mountain, so that 
plants occurring on the summit may be considered as growing in 
both counties. 
ARENARIA STRICTA Michx. This plant occurs abundantly on the 
eastern summit of Rattlesnake Mt., undoubtedly the locality “ sum- 
mit of a hill, Holderness, N. H.," where it was collected in 1891 by 
Dr. R. C. Manning. It has more recently been collected in Bartlett, 
N. H.,by A. S. Pease. So far as the writer knows, these two localities 
are the only stations in New Hampshire. The Mt. Washington 
station, as the foregoing reference mentions, was erroneously recorded 
through a transposition of labels. 
CLEMATIS VERTICILLARIS DC. The purple clematis occurs on the 
eastern summit of Rattlesnake Mt. It has also been noted in Moul- 
tonborough by A. C. Lownes. Associated with it on Rattlesnake Mt. 
are Anychia canadensis, apparently its northern outpost in New 
Hampshire, Arabis viridis Harger; Asplenium. Trichomanes and 
Selaginella rupestris. Scattered over the summit are full-grown trees 
of Quercus coccinea, and conspicuous on the southern slopes is Pinus 
rigida. Both of these trees are rare so far to the northward. 
GAULTHERIA PROCUMBENS L., forma elongata, n. f., floribus et 
fructibus valde elongatis.—F lowers and fruit conspicuously elongated. 
This form is striking. I have seen no herbarium material that even 
approaches it. It grew abundantly over several square rods on the 
eastern summit of Rattlesnake Mt., in open woods which had been 
previously burned, and produced an unusual amount of fruit. Type 
specimens are in the Herbarium of the New England Botanical Club, 
and in the Herbarium of Camp Algonquin. 
THELYPTERIS HEXAGONOPTERA (Michx.) Weatherby. This fern 
grows vigorously in an opening in maple woods near the base of the 
mountain, some of the fronds measuring 35 cm. across. A northern 
locality for this plant. 
1M. L. Fernald: The Status of Arenaria stricta in New Hampshire. Rhod. 
11: 184-185 (1909). 
