PLATE IX 
THE BOTANY OF ICELAND. VOL. III (H. MØLHOLM HANSEN) 
Fig. 18. The Betula nana-Mo on Arnarvatnsheidi. 
Surface covered with vegetation but without knolls, For the composition of the vegetation 
see table 22 A, 7—11, pp. 104—105. 
Fig. 19. The knolly Mo on Arnarvatnsheidi. 
Surface knolly. For the composition of the vegetation see table 23 A, 1—5, pp. 107—108, 
