Upon the Continent it is general throughout middle and 
northern Europe, in mountain regions and moist districts as far 
north as Lapland, and east to Lake Baikal and Siberia; south 
to the Pyrenees, Sierra Nevada, etc., in Spain; elev. 8-9000 
feet; and to Mount Olympus, in Asia Minor ( Sibthorpe ). I 
have in this work only noticed the European form of this plant. 
Some of the most able of botanists have considered as distinct a 
state of this, with generally broader fertile pinnules, abundant 
in the mountains of Northern India (C. Brunoniana , Wall.), and 
another found in the Rocky Mountains of North America, and 
extending thence to California and British Columbia (67. acros- 
tichoides, Br.); but I am satisfied that the views I have expressed 
of their specific identity are correct; indeed, I possess some 
Scottish specimens which are almost identical with those from 
India and North America; and from the United States and from 
British Columbia I have specimens quite agreeing with the 
common European form. 
Plate 39. Allosorus crispus, Br., with fertile and barren fronds ,—natural 
size. Pig. 1. Pinnule of a sterile frond. 2. Fertile pinnule. 3. Portion of a 
fertile frond, with the involucre spread open, showing the venation and sori:— 
more or less magnified. 
