1898— 1902. No. 16.] FLOW. PLANTS AND FERNS OF N..W. GREENLAND. 91 
by N.H. Nitsson-Ente to L. arctica, Bu., and I am entirely in accord 
with him in transferring the plants to the following species. 
In Wertueritt, List 1894, several localities are enumerated for L. 
arcuata, which must doubtless go to the present species. 
Mr. Tu. Hotm, in his list of the Stern collection, enumerates two 
localities for L. multiflora var. congesta, which I feel justified in trans- 
ferring to the species here in question. 
At Foulke Fjord, ZL. arcuata var. confusa is, according to my own 
observations, a common plant in different localities. In my collection 
I have also the f. subspicata, Lance. 
It may perhaps seem as if I had taken to great liberties with the 
statements of the different authors, in referring so many of the plants 
to this species, and especially by not including L. multiflora in the list; 
but I think that I am justified by the following facts: I have seen no 
other species from the area except L.arcuata var. confusa and L. ni- 
_ walis, and Naruorst has made the same arrangement (for L. spicata see 
below!); several of the authors whom I have criticized have, in many 
instances, shown that their identifications are not to be implicitly relied 
upon; and lastly L. multiflora is nowhere high-arctic, since the wrong 
statements of Harr are excluded. Indeed, Lance gives it a range all 
over Danish Greenland, but as he mentions no special localities, it can- 
not be seen where its limit really is; and there are some facts which 
make a limit within the borderline of Danish Greenland rather probable. 
L. multiflora does not go north of Scoresby Sound (70°) on the east 
coast, and the variety congesta, which alone is reported from N. W. 
Greenland has, according to Lance, a decidedly southern distribution 
in Danish Greenland, where it is not found north of Ritenbenk about 
70° in the Disco region. Perhaps the main form also hat its limit 
thereabouts. 
There is still a Luzgula-form left about which a notice must be given. 
Naruorst, l.¢., has given a description of a plant which he calls L. spe- 
cata var. Kjellmani. He mentions that at first he took it for a small 
form of L.arcuata var. confusa, but afterwards KyeLLMan induced him 
to transfer it to L. spicata. In examining his specimens in the Stock- 
holm herbarium, I soon found that the stunted state of the plant was 
owing to infection by a parasitic fungus which had infested every flower. 
At my request, Mr. T. WesTerGren of Stockholm, the well-known my- 
cologist, kindly undertook to determine the parasite, and he has since 
informed me that it was Ustilago hyperborea, Buyrt, a fungus known 
previously only from Norway. Mr. WESTERGREN found it afterwards 
