170 Dr. W. Seller on some Plants obtained 
marked in the descriptions of Stedlaria scapigera. As the plant 
in the Society’s herbarium was obtamed also from the shores of 
Davis’ Straits, we nay hope that opportunities will occur of ex- 
amining the species under more favourable circumstances. 
Rosaceax.—Of the Rosacee, besides the Potentilla tormentilla, 
there are several specimens of a Potentilla which deserves some 
attention. These specimens are of the same species, though one 
is much more branched than the others. The lower part of the 
stem is covered with a dense brown mass, composed of the en- 
larged stipules of the inferior leaves. In the midst of this cover- 
ing the stem divides into several branches. These stems or 
branches in all our specimens are one-flowered and few-leaved, 
yet each at its base is covered with brown stipular sheaths arismg 
from itself. The radical or lowest leaves are on pretty long pe- 
tioles arising in the mass of stipular sheaths. These petiolated 
leaves are ternate, and each leaflet is crenate, having from five to 
seven convex teeth nearly but not absolutely equal; im the ter- 
minal leaflet there are commonly seven such teeth. Both sur- 
faces of the leaflets, particularly the lower, are covered with silky 
hairs, and hairs of the same description copiously ciliate their 
margins. They are rather small, each leaflet being about the 
third part of an inch long and less than a quarter of an inch 
broad. The few leaves on the flower-bearing stems are also ter- 
nate, but smaller and less perfectly developed, the terminal leaflet 
having no more than three convex teeth ; these have no petiole, 
but in leu of it a pair of connate stipules. The flower-bearmg 
stems, as well as the petioles of the lower leaves, are hairy, the 
hairs on the former being shorter. The calycine sepals are ovate, 
blunt or subrotund, the five exterior rather smaller than the five 
interior, the mner rather less round than the outer, subequal in 
both rows; both are hairy and frmged with haus. ‘The petals 
are considerably longer than the sepals, large and broad, obcor- 
date or emarginate. 
There are not a great many species of Potentilla hitherto de- 
scribed with ternate leaves. Of these, the only species to which 
our plant approaches are the P. nivea, Vahlana, emarginata and 
nana. In some respects it agrees with each of these. The flowers 
are too large for the P. nivea, and moreover it differs in its whole 
aspect from the P. nivea at least of the Alps. It agrees better 
with the P. Vahliana, which is held to be the same as the P. 
Jamesoniana from Greenland, described by Dr. Greville. The 
leaves however m Dr. Greville’s figure have hardly the same 
aspect; im Dr. Greville’s plant the lateral leaflets are trifid, in 
ours usually quinguefid; moreover Dr. Greville describes the 
leaflets as gashed at the apices, those of our plant are crenate 
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