1919] Fernald,— Arenaria groenlandica and glabra _——Ss_-:19 
New England, southern New York and northern New Jersey, until 
the past June, when at the invitation of Mrs. Orra Parker Phelps, 
he visited with her an extensive area in Charlestown, Rhode Island, 
where she had found the Arenaria abundant in the dry Cladonia 
carpet on exposed granite ledges. At Charlestown the plant was 
passing out of flower and with much mature fruit. It had taller, 
more forking and more brittle stems than in the familiar alpine A. 
groenlandica, no tufted basal foliage, but the flowers and fruits were 
quite like those of A. groenlandica. The habitats at Charlestown, 
either exposed sunny ledges in the pastures where the plant mingled 
with Krigia virginica, Hypericum gentianoides, Juncus secundus, 
and other Carolinian plants, or crevices of ledges in the dry oak 
woods, were so far from boreal stations that it seemed highly improb- 
able that this Rhode Island plant could be identical with the arctic- 
alpine A. groenlandica. Abundant material was collected and it 
proves to be identical with the plant from Middletown and North 
Guilford, Connecticut, and the specimens from the Catskills which 
have always passed as A. groenlandica and it is probable that the 
plants from the Shawangunk and Kittatinny Mts. (as well as from 
the mountains of Pennsylvania), which the writer has not seen, are 
the same; and in no point does this material from southern New 
England and southern New York differ from true A. glabra from 
North Carolina and Tennessee. 
Furthermore, perfectly typical A. glabra occurs northward into 
New Hampshire and Maine; in New Hampshire found on the lower 
granite mountains with Paronychia argyrocoma, var. albimontana and 
other plants of austral affinity or occasionally on ledges in oak woods. 
It is on Welch Mt., a dry warm granitic mass south of the Franconia 
Range, and when Professor A. S. Pease found it in oak woods of 
Carroll Co., he was so impressed with the fact that this was not the 
port habitat for A. groenlandica that he specially commented on 
‘A. groenlandica (Retz.) Spreng., which is not uncommon on the 
Mountains of the Montalban Range, but which is perhaps seldom 
found in so incongruous a situation as here, growing under the shade 
of red oak trees!” ! In Maine A. glabra is found on the lesser granitic 
mountains (Streaked Mt., Oxford Co., Alamoosook, Hancock Co., 
Peaked Mt., Penobscot Co., ete.), and on ledges near the mouth of 
1 Pease, Ruopora, xvii, 233 (1915). 
