DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 311 
Thalictrtjm. For observations on the Arctic Scandinavian forms of this genus, see 
Fries, Summa Veg. Scand. p. 135. 
T. Kemense, Fr. When engaged on the ■ Flora Indica,' Dr. Thomson and I made a very 
laborious investigation of this genus, referring the T. Kemense of Fries's ' Herb. Normale' 
to T. ma jus, Jacq., and further identifying it with the Himalayan T. Maxicellii, Royle, 
which also occasionally possesses stipellae. Wahlenberg referred T. Kemense to T. flavum, 
(fid. Ledebour and Ruprecht) ; and I have received from Dr. Andersson a specimen of 
T. Kemense that seems different from Fries's and to be identical with T. simplex, L., having 
the inflorescence of that plant, which is itself a form of T. flavum. Of Fries's T. Kemense 
1 have fine specimens also from Alten, gathered by the late W. Christy, Esq., having 
rather larger leaves than those of the ' Herb. Normale.' Harvey (' Flora Capensis') has 
referred the only South- African Thalictrum to T. minus {Caff rum, E. & Z., and gracile, E. 
Meyer) . 
T. rariflorum, Fr. {minus, Fries, Herb. Norm.), appears to me almost identical in inflo- 
rescence with the T. strictum, Led. {T. exaltatum, C. A. M.), which, again, resembles few- 
flowered specimens of T. flavum, L. The ' Herb. Normale ' specimen of T.flcnum, marked 
- 
certiss." is undistinguishable from a Siberian one of Ledebour's marked "exaltatum, 
C. A. M." According to Nyman, the T. rariflorum, Fr., is the same as T. Friesii, Rupr., 
tt 
and T. strictum-boreale of Ny lander. Fries does not regard the true T. minus of Lin- 
naeus as Lapponian. 
Anemone Nuttalliana, DC. This is certainly identical with A. patens, L., and was so 
considered in Flor. Bor.-Am., in Torrey and Gray's Flora, and in the first edition of A. Gray's 
Manual. In the second edition of this last work, however, A. Gray keeps it distinct, saying 
that it more resembles A. pulsatilla than patens : this must arise from misconception, as 
Pulsatilla has pinnatisect foliage, and there is no difference whatever discernible between 
Nuttalliana and patens, of both which I have compared large suites of specimens in all 
states. 
A. Vahlii, Horn. (Flor. Dan. t. 2176), a Greenland plant, is referred by Lange to A. 
Richardsoni. 
A. alpina, L. I have seen bnt one Arctic American specimen ; it is much stunted. 
This species has not been found east of the Caucasus in the Old World, though it is not 
^ 
uncommon in North America on both sides of the Rocky Mountains. 
Ranunculus confervoides, Fr. This slender form of the protean R. aquatilis is the 
only one found within the arctic circle ; it is the R. aquatilis /3. pantothrix of Ledebour, 
and, I think, also the R. aquatilis /3. heterophyllus, Fr., of Babington's < Iceland Plants.' 
My Greenland, Iceland, and Lapponian specimens seem to accord well ; but Durand 
(' Kane's Voyage,' Appendix) calls the Greenland plant " 
is the \ ' hederacec 
non linn. 
R. Chamissonis 
and states that 
■pi 
of Gieseke, having a great affinity with hederace 
imissonis, Schl., according to authentic specimens, appears to be the same with 
R. glacialis, L. The distribution of glacialis is peculiar, it having been found in East 
Greenland by the earliest and by all subsequent voyagers, but never on the Baffin's 
