102 
N. Hartz); loc. ign. (July 6, 1892, N. Hartz). Spitzbergen: Tempelbay 
(July 17, 1882, Nathorst). Norway: Palvand (F. Börgesen). 
The anatomy of this form has recently been exhaustively 
investigated by K. Lisszaver; therefore I shall here make only 
a few supplementary remarks. Stomata may occur on the upper 
Fig. 18. Cassiope tetragona. 
Microtome-section through a bud. (Phot.) 
