40 H. G. SIMMONS. [SEC. ARCT. EXP. FRAM 



nell Land. Bartsia alpina is found in America only in Labrador, but 

 it is rather a common plant in Southern Greenland. It must doubtless 

 have come to N. W. Greenland from the south, and is to be placed in 

 Group S. Betula nana is distributed in West Greenland from 63 

 northwards, and, in the east coast, from the Angmagsalik district north- 

 wards to 13 1 I 2 . To the south it is replaced by B. glandulosa, but it 

 appears again in N. E. America, not, however, in the arctic parts. It 

 must also go to Group S, species spread in Danish Greenland, where 

 they are probably immigrants from Labrador and wandering northwards 

 from there. How it has reached Eastern Greenland is another question; 

 it may have come from Iceland, or its area may once have been conti- 

 nuous in the south. Glyceria tenella has so discontinuous a distri- 

 bution that it can only be placed in Group D. 



Taraxacum arctogenum, in Group II, 4, is an endemic Greenland 

 species (Gr. G). Montia lamprosperma belongs to Group S, it is spread 

 to the south in Danish Greenland but seems to be lacking in Arctic 

 America. It may have reached Greenland from Ihe east, as it is com- 

 mon in Iceland and the Faeroes: or from Labrador, where it seems to 

 grow, if the indications of BRITTON & BROWN, 111, Fl., II, p. 4, about 

 "Montia fontana" are to be trusted and thus interpreted. 



Group III, 1, contains 4 species of which one, Carex membrano- 

 pacta, is entirely american; two, Chrysosplenium alternifolium and 

 Alsine Rossii, are lacking in Greenland but reach from Asia as far 

 west as Spitsbergen or (the former) still further in the south. The fourth, 

 Draba subcapitata, is somewhat doubtful, but its distribution in Elles- 

 mereland and further to the south-west, shows that it is an american 

 species within the western parts of our special area at least. It is not 

 yet known with certainty from Greenland, but has a circumpolar distri- 

 bution reaching, on the Atlantic side, to Jan Mayen. These 4 species 

 are to be placed in Group A. Here belong also the species of Group 

 III, 2, which have reached N. W. Greenland. Taraxacum hyparcticum 

 and Ranunculus Sabinei are entirely american, Pedicularis capitata 

 and P. arctica are spread from Eastern Siberia throughout Arctic Ame- 

 rica. Hesperis Pallasii reaches as far west as Novaja Semlja. They 

 have doubtless come to Greenland over Smith Sound, as is also the 

 case with Potentilla Vahliana from Group III, 3. Pedicularis lanala 

 also seems to be an american immigrant in Western Greenland, where 

 it is common in the northern colonial districts. It is, however, a cir- 

 cumpolar plant, and appears also in a small area in S. E. Greenland. 



