1909. No. 8. VASCULAR PLANTS COLLECTED IN ARCTIC NORTH AMERICA. 45 
partionibus petiolulatis subbiternatifidis, laciniis ovatis subrotundisve obtus- 
sissimis; caulinis biternatisectis, calycibus adpresse pilosis; carpophoro car- 
pellisque stylo uncinato rostratis glabris. — Radix perennis, e fibris nu- 
merosis longissimis constans. Caulis 3—4-pollicaris, tenuiter pubescens; 
inferior pars ejus unacum petiolis foliorum inter lapidum fragmina abs- 
condita. Flores magnitudine R. acris, aurei. — Hab. in summis alpibus 
Alatau ad fontes fluvii Lepsa in glareosis ad scaturigines nivibus formatas 
deliquescentibus. Fl. sub finem Junuc. 
Of this plant I have seen specimens in the Copenhagen herbarium 
1° from »Arassan, Nordabhang des Alexander Gebirges, 9—11000 feet, 
5/VI, 1880, leg. Fetissow«, and 2° from »Alatau transiliensis, in trajectu 
Mundschika ad fontes fl. Talgar, reg. alp. sup., 1896, 7/VII, leg. V. F. 
Brotherus<. These specimens are on all points in agreement with the King 
Point plant and with the Hookerian fragment of his R. pedatifidus. The 
description by KARELIN & KırıLow differs in some respects from Hooker's, 
e. g. they say that their plant has »foliis glabrise, while Hooker says 
»folia subciliata et parce pilosa, præcipue sub lente«, and Hooker is right, 
as also both the Arassan and the Talgar plants have somewhat hairy 
leaves, at least the young ones. But apart from such smaller points the two 
descriptions cover one another in a fairly sufficient manner; and as the 
alpine central-asiatic specimens differ in no points of any importance from 
the arctic American ones, I feel it necessary to unite them to one species. 
Its geographical range, viz: Alatau Mountains in Central Asia, St. Lawrence 
Bay (probably), Mackenzie River mouth, Rocky Mountains (52°—53° Lat. N.), 
is very peculiar and much broken, but we must remember how small our 
knowledge is of the flora of the regions in question. 
Although its habit bring R. gelidus near to the mivalis-group, it without 
doubt belongs to the auricomus-group, as also R. affinis and R. pedatifidus. 
To the descriptions given by SCHLECHTENDAL, HOOKER and KARELIN 
& KırıLow I may add a few notes: The shape of the leaf-blades is very 
characteristic and is rather well given in Hooker’s figure: the radical 
leaves are tripartite, the middle lobe is trilobate and the lobes again are 
oftenest more or less lobed or sinuated, the lateral lobes of first order 
are at least twice cleft; in this way the blade is built up by a rather large 
number of short, obtuse, rather broad lobes. The sheaths, petioles and 
blades are covered with sparsely placed, whitish sub-adpressed hairs. Stem 
leaves — at least the lower — are like the radical ones, but the lobes are 
longer and narrower, their sheaths large and whitish. Stem lax, often more 
or less flexible, one- or few-flowered, flowers on long, adpressed-hairy, 
faintly canaliculate stalks; sepals on the outer side with whitish hairs, 
