GEOGRAPHICAL STATISTICS OF THE EUROPEAN FLORA. 115 
Report for 1858, and (pega by Syme in E. B., ed. iii., that the 
‘plant was * found in the Orkneys by Sir R. Murchison and Mr. 
company, and he never even knew Orkney was credited with it 
ad I Bete out to him the bracketed note % a ** Topog. Bot.” — 
Extracts and Abstracts. 
GEOGRAPHICAL STATISTICS OF THE EXTRA-BRITISH 
OPEAN FLORA 
By Tuomas Comper. 
( Continued from p. 26.) 
Degrees of dispersion.—To each species is assigned a figure repre- 
senting its degree of dispersion, "a oie to the group in which it is 
placed by the analysis. The figures,* ranging from 1 to oa} corre- 
spond with those employed in the investigation respecting British 
plants, and the averages of them, by means of which the present 
ropetoa is conducted, are, as in the ‘former paper, carried to two places 
of decimals. 
IL. x ere —The -wider range, 
east and oak “of cede mia ice sot ig high Be oalans latitudes is shown 
in quite as marked a degree by Con baentel sx by Patek pass seem 
evident Boat the following averages 
Species 
23 
101 * eh 
Ns 
9 No setina: tacmbicks 
247 Temperate 2 
533 reaching high N. latitude . R . ‘ 7°24 
* The degrees of ion have — fixed as follows :— 
As see rope itself and G Nort 
es ( ), in which the range both of longitude and latitude is small, 1. 
Southern, Alpine, and e zones, and Tempera’ confined to S. 
latitudes, if found in only one longitudinal division of the Continent, 1; if in 
0, 2; 8 3. c-alpine, Northern: 
visions, icsalpine, N 
Temperate plants, which have a greater range of latitude, if confined to one longi+ 
—— division, 2; if to peg divisions, 3 ; if found in all three divisions, 4. 
For ran nge into Asia 1, 2, or 3 is ‘added’ to the European figure, according as 
os ee Central, or E. Asia. Asiatic plants therefore range from 
sy common to Europe and America, belonging to zones with but little 
range of latitude, 8; to Arctic-alpine, Northern-mon ——- and Temperate 
= 
niversal divisi a non hemisphere, zones with small range of 
ntituds 10 asin a with greater range of lated, 11 — ene 
8. hemisphere 12, 
wee 2 
