The Flora of Disko Island and Adjacent Coast of West Greenland. 101 
to P.emarginata. Other records exist from Godhavn (Mar- 
GRETE SmitH) and Christianshaab (V.), and we can add 
Umanag (LuNpaAGeER) and Jakobshayn (A. P. OLSEN). The 
flowers of the last mentioned specimen are glomerate, 
but the flowering is in its very beginning. The specimens 
of LunpaGeR have pedunculate flowers, but the ribs are 
not purplish. 
4. var. pinnatifida Lreum., Th. Worr, emend. (Syn. P. 
quinquefolia. Rydb. Mem. Dep. Bot. Columb. Univ. 1898. 
P. subquinata Rydb. Bull. Torr. Bot. Cl. 28 p. p. 181, 
1901 P. nivea € subquinata Lance, Consp. FI. Groenl. 
p. 9, 1880. 
The common torm in our area. Exceedingly 
varying according to the conditions of the habitat. As a 
dwarf form from dry rocks with scanty snow covering 
during winter, we consider: 
5. var. uniflora (LepEB.) Th. W. (Syn. 6 arctica Cham. & 
Scux., Lance |. ec. P. subquinata var. Pedersenti Ryvs. 
Bull. Torr. Bot. Cl. 28, p. 182 and probably var. arenosa 
Turez., Lance |. c. p. 236 = P. nivea altaica, BUNGE, 
Rypep., l. c. p. 181.) The range of this form is in our area, 
identical with that of 4, with which it is connected through 
numerous transitions. The most extreme forms are densely 
tomentous and with few flowered stems, recalling the 
aspect of P. Vahliana. In fact Tu. Woxr placed the var. 
Pedersenit as a synonym under P. Vahliana, although 
the pubescense is pure white and not yellowish, the flow- 
ers smaller ete. 
Summarizing the above remarks there are — in our opinion — 
only two unities of a higher order in our area, viz. a common: P. nivea 
pinnatifida and a rare: P. nivea vulgaris. Whether they are indepen- 
dent, hereditary constant species or subspecies or only varieties of 
the same species we cannot at present say. The decision must be left 
ull future observations and cultivating experiments have settled the 
point. 
Vv 199. Potentilla Vahliana Lenn. 
On dry sand and gravel, rarer in stony soil. 
Disko: Very common, especially on the north-land, but also in alpine stations 
or on barren basalt-gravel on the south coast to 69°15’ (P.). 
Hare @ (Taylor; P.). 
Mainland: The basalt- and sandstone-domaines of Nugssuaq, common; 
south of Torssukatak at Ritenbenk (V.; Bg.) ca. 69°45’ and quite isolated on the 
Prestefjeld at Holsteinsborg 66°55’ (W. & H.). 
