Its open spaces are lovely prairies, on which the Daurian flora flourishes in full beauty.
Engler's Versuch einer Entwickelungsgeschichte der Pflanzenwelt (Leipzig, 1879-1882), we should have in Siberia (a) the arctic region; (b) the sub-arctic or coniferous region - north Siberian province; (c) the Central-Asian domain - Altai and Daurian mountainous regions; and (d) the east Chinese, intruding into the basin of the Amur.
The fauna is a mixture of the Siberian and the Daurian - the latter penetrating up the valleys of the Selenga basin.
The Ayan spruce (Abies ayanensis), the Sakhalin fir (Abies sachalensis) and the Daurian larch are the chief trees; on the upper parts of the mountains are the Siberian rampant cedar (Cembra pumila) and the Kurilian bamboo (Arundinaria kurilense).