Vegetation at 

 Ust Algiac on 

 the south side 

 of the Sayansk 

 mountains. 



Fig. 32. Coniferous woodland in the upper Amyl valley on the north side of the Sayansk moun- 

 tains, about 450 m. above sea-level. 



According to our route, we went southwards along the small river Algiac to Ust 

 Algiac, on the Sisti-kem. In the same vicinity, along the river, the wood was in many 

 places somewhat thinner, here and there with more open stretches. Thus, there is 

 evidently somewhat less moisture on the southern slopes of the mountains than on the 

 north side, but quite sufficient to call into existence a complete typical subarctic vege- 

 tation on this side as well, at any rate in the more elevated regions. The dominating 

 forest trees here were Picea obovata, Abies sibirica, Pinus silveslris, Pinus Cembra var. 

 sibirica, Betula humilis, Betula pubescens, Populus tremulu, and along the river thickets 

 of Alnus frulicosa are especially characteristic. 



In order to convey an impression of the general composition of the vegetation 

 in these subalpine tracts here on the south side of the mountains, I will, in the follow- 

 ing, give an enumeration of the plants found by me in different kinds of habitats at 

 Ust Algiac (roughly 980 m. a. s. 1.). 



Here are to be found under-sized spruce-forest with an admixture of clumps of 

 foliferous trees. 



In small meadows in the wood occur here: 



Solidago Virgaurea, Anthoxanthum odoralum, Galalella davurica, Chrysanthemum 

 Leucanthemiim var. ircutiamim, Chrysanthemum sibiricum, Drunella vulgaris. Polygonum 

 aviculare, Urtica urens, Urlica dioica, Plantago major, Plantago media, Potentilla 



56 



