ALPINE FLORA AND FERNS OF NORWAY. 315 
Aspipium Loncuitis, Sw.; Fl. D. tab. 497.—Grows on rocky 
places and in forests throughout the whole country. Rather 
common ; somewhat less frequent in the south of Norway. On 
the mountains it may be found up to the birch-limit, occasionally 
higher. It bears fruit at different times, according to the nature 
of the locality. It may be found here and there in Drivdal, and 
near Kongsvold growing up to the birch-limit. 
A. ACULEATUM (L.) 8 ANGULARE.—Very rare. Grows on 
shady and rocky places. Beitstaden, in Throndhjems Stift, is its 
known northernmost habitat in Europe. It bears fruit from 
midsummer, and is green the winter through. Always grows on 
low ground, below the limit of fir. Has been found on Kolsaasen, 
near Christiania; near Sandvigen, on Ullernaasen, and in Ma- 
ridal; on Hovlandfjeld, near Modum:; and by Holmestrand ; near 
Hidsfoss, near Ruim and Brunkeberg in Thelemark; near 
Tvedestrand, Christiansand ; Lervig and Frue Gaard on Storoe in 
Bergen Stift, on Sandvigs Fjeld and in Dorvedal, near Voss. 
PotysticHUM THELYPTERIS, Roth.; Fl. D. tab. 760.—Grows 
in marshy places, especially in copses on the edge of swamps. 
Rather common in Aggershuus Stift; less frequent in other 
parts of the country. Nummedal, in Throndhjems Stift, is 
its known northernmost limit. Found generally in low-lying 
forests below 1,000 feet above the sea. Bears fruit in July and 
August. 
P. OREoPTERIs, D.C.; FL. D. tab. 1,121.— Not unfrequent from 
the southern parts of Christiansands Stift, 2. ¢., from Lillesand 
along the whole coast to the southern part of Nordland, e. g., 
Helgeland. Less common away from the coast. Bears fruit 
from July to September. Not found at higher: altitudes than 
1,000 feet above the sea. 
P. Finrx mas, Roth.; Fl. D. tab. 1,846——Common in shady 
places through the whole country to East Finmark. Grows on 
the Fjelds up to about the fir-limit. At Drivdal it has been 
found somewhat higher. A variety, P. Hroswm, Professor Blytt 
has only found growing on Egeberg, near Christiania. Bears 
fruit from July to September, according to altitude. 
P. cristatum, Roth.; Fl. D. tab. 1,591.—Has hitherto only 
been noticed in the low lands of the southern parts of Aggershuus 
Stift, never in mountainous regions. It grows at several places 
in the neighbourhood of Christiania, e. g., Ostens6é, Lysaker, 
