STUDIES ON THE VEGETATION OF ICELAND 105 
TABLE 224 CONTINUED. 
Pedicularis flammea..... A3 H 4 > » | 16 4 
Pingvicula vulgaris ...... E 4 H | 12 8 20 | > 
Rumex acetosa........ 2 E 3 H 4 
LTL IT LETÉTE ee Al Ch 4 
Saxifraga Hirculus ...... A3 H > 4 
Sedum villosum......... A2 H 8 |12| >} 4) 4 
Tofieldia palustris....... A 2 HR sh > > | 48 8 | > 
Trisetum spicatum ...... A 3 H |12 | 16 12 | 4 36 12 8 
TABLE 228. 
Biological Spectra of the Melar and Betula nana Mo. 
emits. stim........- 936 792! 560 848 | 812 | 800 | 1304 | 1044 1064 1172 1080 
Number of species... ||. 34 | 31 | 20 | 32 | 24 | 21 | 36 32 29 29 32 
Density of species .. | 9.4 7.9} 5.6 8.5 8.1! 8.0) 13.0! 10.4! 10.6 11.7 10.8 
eee 79.1 81.8 81.4 79.2 83.3 80.0 71.5 | 736 68.4 71.7 66.3 
| 20.9 | 18.2 | 18.6 20.8 | 16.7| 20.0) 28.5) 26.4) 31.6| 28.3| 33.7 
ee 51.3 59.1 56.4 55.7 59.1 50.5 40.5 47.5 41.4 44.7 40.0 
et ee 24.4 | 18.7 12.9 | 21.7 | 19.7 22.5 | 27.6 24.1 25.6) 21.8 22.2 
mm 34| 40112.1 19, 44 7.0 3.4 1.9 15) 5.1| 41 
| | | 
' | er | EN EET = va 7 i 
anne 20.9 | 18.2 | 18.6 20.8 | 16.7 | 20.0 27.6| 26.4 308 26.6| 33.3 
ee ss PR SEER Ye an aT ee 
E 2 sms | 3 2 » » | » > > | 2 > 3 | > 
ee » | » » > » » | | 3 \ > 
Er I 7 a mare Il = Fa 5 Ten 
reed 50.0 49.0 | 59.3 53.3 53.2 49.5 46.6 45.2 49.2 47.4 47.8 
PR 37.6 36.4 | 31.4 | 34.0 36.5 39.5 40.8 36.0 33.5 39.9 33.3 
he 10.7! 9.1! 8.6| 11.8 | 8.4 | 10.5 || 11.7 | 17.2| 16.9! 12.6) 17.8 
4 | > »| >» | » > > » > 
ANNEE 1.7| 5.6| 0.7| 0.9| 20} 05) 09] 15) 04 >| 11 
will show. Some species occur exclusively or prineipally on melar, 
others exclusively or principally in the Betula nana mo, while a 
third group is common to both types of vegetation. The table shows 
more precisely which species belong to the respective groups. Phy- 
siognomically the chamaephytes dominate. A random selection of 
