So from the first down to the present all rivers have not been equally suited for the growth of plants and trees. Tamarisks grow best and in the greatest numbers by the Maeander
; the Boeotian Asopus can produce the tallest reeds; the persea tree flourishes only in the water of the Nile
. So it is no wonder that the white poplar grew first by the Acheron
and the wild olive by the Alpheius, and that the dark poplar is a nursling of the Celtic land of the Celtic Eridanus.