58 H. G. SIMMONS. [sec. arct. exp. fbam 



still it is probable, that the seed was taken from a plant which Leh- 

 MANN had approved of as P. fragiformis. 



Trautvetter has here, as in several other cases, done his best to 

 add to the alread)^ existing confusion. First be established the name 

 P. fragiformis var. parviflora for the plant, which had already two 

 specific names (cf. synonyms) and later he transferred it to still another 

 species. About P. nana, (Willd.) Schlecht., it must finally be added, 

 that even if it is kept separate from P. emarginata, some authors at 

 least have had a suspicion about their identity. Hooker, for instance, 

 (1. c, I, p. 194) says: "May not this be the P. emarginata, Ph.?" 

 Rydberg, who in his monograph kept three different species, has after- 

 wards (Furth. Stud. Potent., p. 180) been forced to admit, that they are 

 only forms of one. The character by which he has distinguished them, 

 the length of the terminal tooth in the leaflets, is quite useless. I think 

 that under some records of P. nivea, P. emarginata may also be found 

 hiding. To judge from the synonyms, R. Brown, Chlor. Melv., p. 19, 

 gives under his P. nivea (i, and from a specimen collected in Melville 

 Island by Sabine, which lay under P. nivea in the Nat. Hist. Mus. 

 herbarium, he has had P. emarginata in front of him. 



In grass-clad ledges and slopes P. emarginata is a rather common 

 plant throughout the whole region visited by me. Its first flowers came 

 rather early, about the middle of June, but flowering specimens could 

 still be found in August. Like all Potentillae it fruits abundantly. 



Occurrence. Grinnell Land: Shift Rudder Bay and Discovery 

 Harbour (Hart). Hayes Sound region, common and plentiful. Speci- 

 mens from: Cape Viele (861), Skrahng Island (1377), Eskimopolis (836), 

 Cape Rutherford (318, 684), Fram Harbour (658, 1083), Cocked Hat 

 Island (1268), Bedford Pim Island (1194, 1259). South coast, less abun- 

 dant. Specimens from: Fram Fjord (1629); Harbour Fjord, valley on 

 Sir Inglis Peak (2163); Goose Fjord, Gallows Point (2996), surroundings 

 of 3th winterquarters (3183, 3264, 3481), Midday Knoll (3506), 4th winter- 

 quarters (3958). West coast: Lands End, and between Eidsfjord and 

 Baumann Fjord. 



Distribution: Northern East and West Greenland, Arctic Ame- 

 rican Archipelago, Arctic America, Labrador, Rocky Mountains, Alaska, 

 Islands of the Bering Sea, Arctic and Eastern Siberia, Novaja Semlja, 

 Spitsbergen, Franz Joseph Land. 



