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Мовтем Р. PorsrrD. 
Type-denomination and -symbols. 
At almost every species we have stated to which type of distri- 
bution it belongs. In this we have mainly considered West Greenland 
in its entirety, and then the rest of Greenland, America or Europe. 
Besides we have tried to fix the type-determination in a symbol 
which through its form might direct the thought to what it ought 
to express, and yet be produced in ordinary typographical get-up. Thus 
signifies: 
+ 
a species whose main distribution is in the high arctic territory 
and which only, as an isolated exception, occurs to the south of 
this. 
a northern type whose distribution extends from the high arctic 
territory more or less far down into W. Greenland where it gra- 
dually becomes scarcer or at last occurs but as alpine. 
an arctic type widely distributed in W. Greenland yet decreas- 
ing, alpine or quite absent in the very southernmost part. 
a widely distributed species without northern- or south- 
ern limits in W. Greenland. 
widely distributed species which yet, as far as hitherto known, 
become scarcer or are quite absent аз well in the north- 
ernmost as in the southernmost W. Greenland. 
widely distributed species without southern limit, but 
which yet in the northern tracts become very scarce, confining 
themselves to specially favourable sites or being quite absent. 
southern types, subarctic species without southern limit, but 
with more or less sharply marked northern limits in W. Greenland; 
in our area all of them lowland plants. 
non-arctic types whose main distribution in other countries 
is in the temperate regions; in our area they are rare and 
without continuity in their distribution. A great number of aquatic 
plants are classed among them. 
Finally we have incorporated with number two plants that hitherto 
have been found only in South Disco. They are not sufficiently known 
