Mr. Tuckerman, on some Plants of New England. 29 
the leaves, which at once distinguish this from every other spe- 
cies which has yet been found in Massachusetts. Scapes 6-8 
inches high, with two or three flowers, which are much smaller 
than those of U. vulgaris. 'The leaves somewhat resemble those 
of yarrow, whence the specific name proposed by Mr. Nuttall for 
the American plant. They are many-cleft, with the segments 
linear and spinulose-denticulate. The bladders grow separately 
from the leaves, on branched stalks. ‘The specimens seem to 
agree with the European; and the Tewksbury plant is pronoun- 
ced to be U. intermedia, by Hooker, 1. c. 
_U. srriata, (Le Conte): foliis dichotomis capillaceis, calcare 
breviusculo subconico obtuso, labio superiore rotundato-ovato sub- 
emarginato margine undulato, inferiore trilobo margine reflexo, 
pedunculis erectis 2-6-floris.. Torr. Fl. 1, 20. (p. m.) 
~ Hab. Tewksbury, Mr. Greene ; (v. s. ex herb. Greene sine 
nom.) Agrees with the New Jersey plant in every respect, but 
that in the latter the flowers are somewhat larger. Leaves capil- 
lary at the extremities, but apparently analogous with the seta- 
ceous true leaves of U. intermedia. ‘Bladders few, among the 
leaves. Flowers somewhat numerous; in my specimen six. 
Spur short, obtuse. 'The Flora of New England is very rich in 
this curious and elegant genus. With these, eight species are 
now known to be inhabitants of our waters; while in the recent 
New York catalogue of Dr. Torrey, only five are mentioned. 
or two others will most probably be added to our list; and 
Tam almost certain that [have the true U. minor from Plymouth. 
Oxvrra renirorms, R. Br., Oakes, Pl. N. Eng. (in Hovey’s 
Mag) p. 16.—Hab. White Mountains; moist ravines in the 
Most alpine regions, Pickering and Oakes, 1825; E. T. 1840. 
believe this plant has been found by no others, and it is one 
of the rarer forms of our alpine regions. I found it growing 
Na in a very secluded alpine gully, with Cardamine bellidi- 
“ Berora—Having been led to examine several small-leafed 
Birches in my collection, I arrived at some results which seemed 
Worthy of being mentioned, especially as there is some confusion 
in regard to our species. a 
_B.romna, (L.): humilis, foliis orbiculato-obovatis serratis sub- 
= Tamulisque pubescentibus, amentis feemineis  cylindricis. 
Willd. Sp. 4, 467, L. Mant. 124, Kalm, Itin. 1, 108, (sub Bs 
nana.) B. glandulosa, Sulliv. (ex spec.) 
