92 Mortres P. Ponsitp. 
I 187. Saxifraga nivalis |. 
In bogs, herb-mats, on rocks and fell-field; best developed in sunny 
crevices with abundant moisture. 
Common throughout the whole area, but nowhere occurring in 
great quantities. 
Widely ranging in Greenland without northern or southern limit. 
\scends to considerable altitudes. 
Abundantly flowering and fruiting. 
Hardly snowless during winter. 
Varies according to the quality of the habitat from the smallest 
dwarf-forms to robust gigantic specimens. 
A 188. Saxifraga stellaris L. 
To this species | only reckon the so-called mainspecies: S. stellaris & 
characterized by richly ramified inflorescences, abundant flowering and 
fructification, large rosette-leaves and low stems, whilst the following 
species has a rich development of bulblets in the inflorescence, narrower 
and firmer leaves and higher stems. In 1910 I collected plants of S. stel- 
laris near Godthaab (64°11’) and cultivated them on South Disko 
where this species does not occur. They flower and fruetificate every 
year and keep the normal aspect of the vegetative parts, without 
forming any transitions to S. comosa. 
LinsBAveER (Oesterr. Bot. Zeit. 63, 1913; not seen, abstract in 
Bot. Centralbl. 126, p. 313) has cultivated bulblets of S. comosa and 
developed flowering specimens. From the abstract it cannot he seen 
whether they also were S. comosa, what I suppose, as flowering, in my 
opinion, does not mark a transition to S. stellaris. Young and feeble 
specimens of S. comosa will often show one or a few flowers without 
any bulblets at all, whilst older and more vigorous specimens develop 
bulblets abundantly, with or without development of flowers. 
S. stellaris seems to be absent in America, whilst S. comosa is widely 
distributed in Arctic America. 
LinpMark (Bidrag till kannedomen om de svenska Saxifraga- 
arters yttre byggnad och individbildning. Bih. K. Se. Vet. Ak. Hand. 
28, Afd. III, Nr. 2, 1902) figures, in pl. I] figs. 4 and 5, seeds from spec- 
imens from northern Sweden and states their size to be 0,6 mm. In the 
figure the seed-coat is covered by rather long and coarse seriated pa- 
pillae (seriatim tuberculatac LANGE). Seeds from dried specimens frem 
Valders, Norway, showed the same appearancec The seeds of 8. 
comosa from Greenland were somewhat larger, 0,7—0,8 mm, the pa- 
pillae were lower, their rows denser, their appearance intended to be 
