STUDIES ON THE VEGETATION OF ICELAND 33 
TABLE 7. The Biological Spectra of the Species Groups. 
Pt n Ph Ch H G HH Th 
be whole flora......... 1.4 349 el 152 52.4 10.6 9.2 alas 
EN (See 5.6 || 143 24 CHD 1053215 1122 22782 76:3 
nice en: 8.7 | 206 1.9 7.3 | 51.9) 10.2 | 13.6 | 15.0 
Ca | 
Ne; 3.8 53 » 30:27 52:37 7.1173 3.8 1.9 
neun 4.0 50 > 26.0 52.0 10.0 2.0 | 10.0 
ee 1225 40 | > 22:5 55.0 1275 2, ANSER 
| — -|| — || —— ——— - - 
L LORS SE SYET ss 11.8 51 sl 43.1 9,8 | 25.5 9.8 
A RSS 10.4 48 2.1 6:37 56.3 | 12.5) 10.4 | 12:5 
ER RER 8.2 49 4.1 200598 TOs 72220 16.3 
7 
| Der 589 5770 1 23.4. 30:0 8.6 | 15.5 20.7 
at the coasts increased, and the amount of Gulf Stream water de- 
creased, towards the west and north, until it reached its highest 
value, 18 p.c. in East Iceland, at the same time as the Polar water 
became prevalent at the coast. This was the result round the entire 
coast, and on passing from the level of the sea towards the snow- 
line the Ch. percentage rose very greatly, from c. 20 p. c. at the 300 m 
curve to c.50p.c. at the snow-line, the 1200 m curve. 
If we examine the relations of the species groups under the 
same conditions, as done in table 5, we find a very close corre- 
spondence between the A percentage and the Ch percentage. If we 
proceed in the same way round the coast from South Iceland via 
W. and N. to East Iceland, the A percentage shows an unbroken rise 
from 39.2 p.c. in South Iceland, to 45.2 p.c. in East Iceland, and if 
we pass from the sea to the snow-line, the same fact appears. The 
A percentage for the whole country is 40.3, at the 300 m curve it is 
49.5, rising to 80 at the snow-line. The table likewise shows the 
relations of the subgroups. The 20 p.c. Ch biochore seems to coin- 
cide with the 50 p.c. A biochore. 
Raunkiærs life forms and the phytogeographical spe- 
cies groups thus react similarly to the same external 
conditions. The species groups are, however, more sen- 
Sitive than the life forms. 
The Botany of Iceland, Vol, II. 3 
