286 M.E. P. Fries on the Geographical 
The same remarks hold good in reference to the Agaricinze of 
Siberia, Kamtschatka, the Ukraine, &. The countries bordering 
upon the Mediterranean possess, however, several peculiar types ; 
and Eastern and Western Europe present certain dissimilarities 
in their Agaric inhabitants.. Several species, for example, of 
Armillaria and Tricholoma which have been found in Russia 
have been met with in Sweden only in Upland, that is, in its 
most eastern provinee ; all the species which belong to the so- 
called abiegno-rupestres and pineto-montane regions of Sweder 
are wanting in England; and it is only in Scotland that the 
species of our northern mountainous and pine-bearing region are 
met with—a circumstance explicable from the similarity in phy- 
sical features between Sweden and the northern portions of 
Great Britain. 
The species of Coprinus appear to find suitable habitats in 
every quarter of the globe. 
The Cortinarie predominate in the north: they abound in our 
latitude, especially on wooded hills; but the plains offer also 
some peculiar species, which. germinate during the rainy days of 
August and September. In less cold countries they are more 
scarce; or entirely absent. The species of the genus Hygro- 
phorus would at first seem to have a similar geographical distri- 
bution to those of the last group: but this is really not the case; 
for the same Hygrophori are to be found in nearly every country 
of Europe, and even the hottest countries (and those under the 
equator) are not destitute of representatives of this wide-spread 
enus. 
The Lactarii, which are so abundant in the forests of Europe 
and North America, appear to grow more and more scarce to- 
wards both the south and the north. The same may be stated 
in regard to Russula. . 
~ The genus Marasmius is dispersed throughout the globe, and 
everywhere presents numerous species. In intertropical eoun- 
tries they are still more abundant, and exhibit peculiarities in 
growth which probably might justify their collection into a 
distinct group. . 
The genera Lentinus and Lenzites are found in every region. 
of the world; their principal centre, however, is in hot countries, 
where they attain a splendid development. On the contrary, 
towards the north they rapidly decrease in number. | 
- The Polyport constitute a group which, unlike that of the 
Agarics, especially belongs to hot countries: the Boleti consti- 
tute the only exception to this rule, since they select the tem- 
perate and frigid zones for their special abode, and some of them 
at times find their way to the higher regions of the Alps. No 
one can describe the luxuriance of the torrid zone in Polypori 
