ON THE WORLD-DISTRIBUTION OF BRITISH PLANTS. 87 
World, and enter, in the next division, upon those that are not found 
in Asia. They are very few in number, being limited to only 42 
species; but, few as they are, they would be further diminished if 
g ca. 
which have escaped from cultivation, and by this means become 
naturalised with us; 3 others are also American plants believed to have 
been introduced by human agency. Deducting these 11 naturalised 
species, there are lett only 31 as native with us, ee of which 6 are 
Kuropean plants, found in America in Greenland ou 
GRov outhern Europe and America. ste contains 9 
aplocion, of which 3 have been met with in North Africa and 2 in the 
Souther n Isle 
nour X, "Tempera ate Europe and America.—Twenty species, : 
of which are found in the rors regions; 4 in the Northern Isles; 
in the Azores; and 5 in Afric 
Guour XI. Aorthern Nubile and America.—Of the 5 species 
under this group, 8 have American stations only in Greenlan 
Group XIl. Arctic Europe and America.—This contains 8 
species, all rare with us, being mostly confined to the Scotch moun- 
tains; 6 are found in Iceland ; and 2 extend on the other side of the 
Atlantic to Greenland only. 
Grove XIII. Buachors Universal.—Contains only 23 species. A 
few only are confined to North Temperate regions; the great majority 
extend into the Tropics, and some seem to grow more plentifully and 
luxuriantly there; more than half extend into the Southern Hemi- 
sphere; and aeveral have there a wider range than in Northern lati- 
tudes. But for its small number this group might, therefore, be 
divided into sections corresponding to those proposed for the following 
ne. 
Group XIV. Zemperate Universal.—Contains in all 289 species, oe 
ube 8 two-thirds, 192, have been recorded from Arcti 
regions ; 97 trom Greenland; 156 from the Northern, and ] 02 er 
the Southati Isies. Altogether 191 bor 66 per cent.) occur in one or 
more of these intermediate stations; and 135 (or 47 per cent.) extend 
to North = trica. A number of the plants are as common in America 
as with us; but gener ea Lied species of this group are more frequent 
in the Old World, and a are foundonly in isolated stations in 
eri vieokead weeds are included oup 
ae 194 species, are confined to the Northern Hemisphere ; the 
Koven? 4, he ieramis 95 species, extend more or less South of the 
qua 
Seo ction 1. Twelve species found on the other side of the Atlantic 
in Greenland onl 
Section 2, Fifty-five species which occur only East of the Rocky 
Heh iaink, 
‘on 3. Sixteen species which, on the other hand, are recorded 
only ye a Western America. 
