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 
Umanagq (LunpAGER) and Jakobshavn (А.Р. ОтзЕм). The 
flowers of the last mentioned specimen are glomerate, 
but the flowering is in its very beginning. The specimens 
of LUNDAGER have pedunculate flowers, but the ribs are 
not purplish. 
4. var. pinnatifida Lenum., Th. Worr, emend. (Syn. P. 
quinquefolia Rydb. Мет. Dep. Bot. Columb. Univ. 1898. 
Р. subquinata Rydb. Bull. Torr. Bot. CI. 28 p. р. 181, 
1901 P. nivea e subquinata LANGE, Consp. Fl. Groenl. 
о 9, 11950. Als 
The common form 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: 
var. uniflora (Leprs.) Th. W. (Syn. В arctica Cham. & 
SCHL., LANGE 1. ©. P. subquinata var. Pedersenu RYDB. 
Bull. Torr. Bot. Cl. 28, p. 182 and probably var. arenosa 
Dura, Lance 1. ©. р. 286 — Р. nwea aliaica, BUNGE, 
RYp8., I. с. р. 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 ol P. Vahliana. In fact Tx. Worr placed the var. 
Pedersenii as a synonym under P. Vahliana, although 
the pubescense is pure white and not yellowish, the flow- 
ers smaller etc. 
Ol 
Summarizing the above remarks there are — in our opinion — 
only two unities of a higher order in our area, viz. a common: Р. nivea 
pinnatifida and a rare: Р. 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 
till future observations and cultivating experiments have settled the 
point. 
V 199. Potentilla Vahliana LEnm. 
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 Ø (Taylor; P.). 
Mainland: The basalt- and sandstone-domaines of Nügssuaq, common; 
south of Torssukatak at Ritenbenk (V.; Bg.) ca. 69°45’ and quite isolated on the 
Præstefjæld at Holsteinsborg 66°55’ (W. & H.). 
