230 Rhodora [ DECEMBER 
Braunii and Asplenium angustifolium were hardly to be expected 
here, and careful search has failed to reveal them elsewhere in the 
vicinity. All are species of the deep woods of mountainous regions, 
the station for Asplenium angustifolium being close upon the eastern 
limit of its range in New England, and that of Aspidium aculeatum, 
var. Braunii one of comparatively few in New England, the others 
being mostly confined to the White and Green mountains, or to more 
northern mountainous localities. Thetford, situated on the Connec- 
ticut River, is not at all mountainous, possessing only a few hills 
with isolated patches of woods. ‘The ferns of the ravine, which I 
have described, represent then, apparently, the few survivors of a 
primitive, uniformly wooded condition, and will themselves undoubt- 
edly soon succumb to the already threatened deforestation of their 
home. 
Since writing the above, further observation reveals a single plant 
of Aspidium acrostichoides, var. incisum. ‘The plant is noticeably 
distinct, with thicker, very dark green fronds, large, deeply-incised 
pinnz, and the fruiting dots occurring in small numbers on each 
pinna, separate, and in no case confluent or covering the pinna. 
President Brainerd of Middlebury kindly confirmed my identification. ` 
‘THETFORD, VERMONT. 
TWO NORTHEASTERN THALICTRUMS. 
M. L. FERNALD. 
( Plate 21.) 
Late in June, 1899, the Josselyn Botanical Society of Maine spent 
a forenoon exploring the south bank of the Aroostook river at Fort 
Fairfield, Maine. Among the more striking discoveries was a delicate 
meadow-rue first detected by Miss E. L. Shaw in the alluvial thicket 
below the village, and afterwards found in abundance, by other mem- 
bers of the party, in the thicket which, along the Aroostook ( as well 
as the St. John ), forms the boundary between the steep wooded bank 
and the gravelly beach of the river. The Zhadictrum, then in bloom, 
was a dioecious or slightly polygamo-dioecious species, suggesting in 
its flowers, and its thin glaucous foliage, the early meadow-rue ( 7* dio- 
icum ) of southern New England. The stems of the Aroostook valley 
plant, however, were much taller, often 1 m. high, bearing from three 
