106 
The specimen of Ross represents a form with very small leaves which cannot, however, be 
referred to the other, commonly spread, species. Thus Boothia comes to form the northeastern 
bonndary of the american area of D. octopetala, apart from its Greenland range which must be 
looked upon as an isolated colony from the european area. 
136. Geum Rossii, (R. Br.) Ser. 
Sieversia Rossii, Brown, Chlor. Melv. 
Distribution. Melville Island, J. C. Ross (ex Brown, 1. c.) Beverley, 
Sabine, Beechey (KH). 
Geographic area. Western arctic North America, eastern and arctic Asia. 
137. PotentiUa pulchella, R. Br. 
P. nivea L. var. pulchella, Hookeb, Coll. & Exp. Fox; P. Sommerfeltii, Rydbkro, List Peary. 
Distribution. Banks Land: Bäring] Land, M'Clure (KH); [Boothia FeHx 
?, John Ross (NHM)]; North Soinerset; Port Kennedy, Walker (ex Hooker, Exp. 
Fox), Fury Beach (?), Parry (KH); [Melville Peninsula: Igloolik, Parry (NHM, 
KH, CH), Hooper (LS), Winter Island, Hooper (LS)] ; Baffin Land: Murray Maxwell 
Inlet, Hoppner (ex Parry, Journ. II, p. 453), Ponds Bay, Walker (ex Hooker, 
Exp. Fox); Melville Island, Sabine (KH); North Devon: Powell Creek (KH), Beechey 
Island (KH, SH), Northumberland Sound, Lyall (ex Hooker, Coll.), West Fjord, 
SiMMONs (Stray Contr.); North Kent, Simmons (I. c); Heiberg Island: Whitsunday 
Bay, Skräling Point, Schei (ex Simmons, 1. c); Ellesmereland: rather commonly 
distributed, Hart, Greely, Simmons; Bartlett (CH), Wolf (ex Rydberg, 1. c). 
Geographic area. Greenland, Arctic America, northeastern Asia, Novaja 
Semlja, Spitzbergen. 
The above list of localities certainly gives only an imperfect idea of the distri- 
bution of this species which has been in many cases thrown together with P. nivea, 
as has also the following one. A curious fact is that no coliector seems to have 
brought it home from Cumberland Gulf. P. Sommerfeltii, Lehm., which Rydberg 
insists on upholding, is only an insignificant glabrous form. 
138. Potentilla rubricaulis, Lehm. 
P. nivea, Brown, Chlor. Melv. (ex parte), Hooker, App. Parry II (ex p.), Hooker, Coll. (ex p.). 
Distribution. Banks Land: Mercy Bay, Miertsc hing (KH) ; Victoria Land: 
Minto Inlet, Anderson (KH), Prince Albert Sound, Miertsching (KH); King- 
William Land: (Tjöa Harbour. LiNn.sTR.oi Melville Peninsula: Barrow River, 
Pakuy Klii : MrlviUc Ivhmd. la.rl. Mi LS ; Nort Devon : Cape Riley, Pullen 
(KH); lleil.LT- IshiM.i: Ily|„.riu; I'.r,i,t. s, hki (ex Simmons, Stray Contr.); EUes- 
merolaii.l: t-i-ht localities in rhr south and east. Simmons. 
(reographic area. Nortliorn Greenland, arctic and subarctic North America, 
especially to the west, Rocky Mountains. 
