▁which ▁he ▁system atically ▁configured ▁according ▁to ▁a ▁ph yt oge ographical ▁principle . ▁He ▁remained ▁at ▁Dresden ▁until ▁his ▁ret irement ▁in ▁ 1 9 2 0 , ▁twice ▁serving ▁as ▁university ▁re ctor ▁( 1 9 0 6 - 1 9 0 7 , ▁ 1 9 1 8 - 1 9 1 9 ). ▁ ▁He ▁is ▁known ▁best ▁for ▁his ▁research ▁in ▁the ▁field ▁of ▁plant ▁ge ography , ▁that ▁included ▁mapping ▁of ▁the ▁world ' s ▁different ▁flor istic ▁zones . ▁With ▁Adolf ▁Eng ler ▁ 1 8 4 4 - 1 9 3 0 ), ▁he ▁was ▁co - editor ▁of ▁Die ▁Veg et ation ▁der ▁Er de ▁( 1 8 9 6 - 1 9 2 8 ). ▁ ▁Princi pal ▁works ▁▁ ▁Atlas ▁der ▁Pfl anzen ver bre itung , ▁ 1 8 8 7 ▁ ▁Hand buch ▁der ▁Pfl anzen ge ographie , ▁ 1 8 9 0 ▁ ▁Deutsch lands ▁Pfl anzen ge ographie , ▁ 1 8 9 6 - ▁ ▁Die ▁Ö k ologie ▁der ▁Pfl anzen , ▁ 1 9 1 4 . ▁ ▁References ▁▁ ▁Deutsche ▁Biographie ▁Dru de , ▁Carl ▁Georg ▁Oscar ▁ ▁Category : G erman ▁botan ists ▁Category : G erman ▁e colog ists ▁Category : 1 8 5 2 ▁birth s ▁Category : 1 9 3 3 ▁death s ▁Category : Pe ople ▁from ▁Braun sch weig ▁Category : Pe ople ▁from ▁the ▁Duch y ▁of ▁Brun sw ick ▁Category : Bra un sch weig