Travels and Botanical Investigations in Kast-Greenland. 999 
vals between the bushes and at a level with their surfaces or higher. 
The thickets are found on SW.—SE. declivities sheltered from the 
foehngales which blow from N.—W. and attain a rapidity of up to 
60 m pr. second. The thickets crave a constant snow-covering in 
winter, but also abundant running water in summer. There exist 
7 types of thickets. 
А. Miscellaneous thickets made up of Salix and Juniperus, 
Salix and Betula, or all three together with Empetrum. 
B. Salix glauca-thicket is found in 5 types, namely : 
1. Brook-thickets on the borders of brooks on slightly inclined 
bottom. Bottom-vegetation scarce. 
2. Furrow-thickets on moraineclay with profound rainfurrows. 
The bushes stand on the walls; the bottom-vegetation in the 
furrows. 
3. Tuft-thickets upon nearly horizontal bottom with plenty of 
stones grown with moss. The stones carry the bushes. Bog- 
vegetation among the stones. 
4. Slope-thickets on strongly inclined (> 20°) bottom with 
plenty of ground water. Bottom-vegetation inconsiderable. 
5. Open thickets on strongly inclined bottom. The bushes very 
straggling, but not contiguous; they often form a transition to 
herby slopes or heather-moor. 
ee Juniperus-thicket. On rather dry bottom near steep 
inclinations. Bottom-vegetation only slight, but the individuals 
are big. 
The bottom-vegetation of the thickets is noted p. 229 where a 
distinction is made between common and rare species. On page 
230 is a list of the occurring mosses. 
The willow-bushes (figs. 30 and 33, Salix glauca, fig. 31, creeping 
bush from the heather-moor) attains a height of 105cm; generally 
but 30—55. The branches become 70—300 cm long, decumbent, 
rising from touchwood trunk. Transverse section is seen fig. 32, 
age p. 236. The birch fig. 34, age is seen in the list p. 237. Juni- 
perus communis у. nana, fig. 35. Age of espalier-trunks see р. 239. 
The Herby-Slopes (p. 239). 
The herby-slopes are defined as a dense cover of perennial herbs 
upon strongly inclined bottom without or with only a spare inter- 
mixture of woodplants. The formation demands the most favourable 
conditions; constant snow-cover, which disappears last in June, 
abundant watering with running, not stagnant water, shelter against 
