

1898-1902. No. 16.J FLOW. PLANTS AND FERNS OF N.-W. GREENLAND. 63 



No. 4271, but I have deemed it best not to give them any separate 

 name. 



Occurrence. S. Whale Sound: Netiulumi (WETHERILL); Foulke 

 Fjord: grassy slopes and ledges near Etah (205, 1460, 4270, 4271). All 

 older statements must be excluded even though it may be probable that 

 the plant has a wider range within the area here in question. 



Distribution: East and West Greenland, southern islands of the 

 Arctic American Archipelago, Arctic America, Labrador, Canada, New- 

 foundland, Rocky Mountains down to Utah and Colorado, British Co- 

 lumbia, Eastern Siberia, down to the Himalayas and the Caucasus, Arc- 

 tic Russia, Northern and Alpine Scandinavia, the Alps, Novaja Semlja, 

 Spitsbergen. 



Potentate Vahliana, LEHM. 



P. Vahliana, SIMMONS, Fl. Ellesm.; WOLF, Mon. Gatt. Potent. 

 [P. Vahliana, NATHORST, N. W. Gronl.; WETHERILL, List 1894; OSTEN- 

 FELD, Fl. pi. Cape York; P. nivea, DURAND, PL Kan.]. 



Owing to the confusion with other species, especially P. nivea, in 

 the statements of most authors, it is difficult to form any distinct opin- 

 ion about the range of this plant, as I have already shown (1. c., p. 55). 

 I will, however, try to give a list of the places where it is found as far 

 as can be judged from the statements in literature or from specimens 

 seen in the collections. 



Occurrence. S. Cape York (WETHERILL); Ivsugigsok (NATHORST); 

 Umanak and Agpa in Wolstenholme Sound (BALLE); Carey Islands: 

 Bjorling Island (WETHERILL); Netlik (HAYES); Foulke Fjord: gravel and 

 clay plains near Etah (210, 1498); Rensselaer Bay (KANE). Probably also 

 further northward, as it is found in Grinnell Land. 



Potentate emarginata, PURSH. 



P. emarginata, SIMMONS, Fl. Ellesm.; OSTENFELD, Plautes N. E. 

 Gronl. [P. emarginaia, MEEHAN, Contr. GreenL; WETHERILL, List 1894; 

 OSTENFELD, Fl. pi. Cape York; P. fragiformis, NATHORST, N. W. Gronl.; 

 P. frigida, HART, Bot. Br. Pol. Exp.; WETHERILL, I.e.; DURAND, PL 

 Kan.; P. nivea /? concolor, DURAND, 1. c.]. 



Probably this species is common throughout the area, as most 

 collectors have brought it home. Most authors seem also to have been 

 able to distinguish it from others; but still it seems fairly probable that 

 the P. nivea p concolor of DURAND, PI. Kan., p. 190, belongs to it, as 

 doubtless does his P. nana. 



