Before revision: Veröffentlichungen des geobotanischen Institutes Rübel in Zürich, 4 By this time, Warmings 'ecological plant geography' har developed into 'ecological plant geography' plant ecology and the excursion programme returned to 'floristic plant geography'.
After revision: Veröffentlichungen des geobotanischen Institutes Rübel in Zürich, 4 By this time, Warmings 'ecological plant geography' had developed into plant ecology and the excursion programme returned to 'floristic plant geography'.