During the disastrous Swedish War of 1643-1645 Frederick was appointed generalissimo of the duchies by his father, but the laurels he won were scanty, chiefly owing to his quarrels with the Earl-Marshal Anders Bille, who commanded the Danish forces.
" On days of rejoicing," he says, " we do not shade our door-posts with laurels nor encroach upon the day-light with lamps " (die laeto non laureis postes obumbramus nec lucernis diem infringimus).
The chief trees belong to the orders of Terebinthaceae, Sapindaceae, Meliaceae, Clusiaceae, Dipterocarpaceae, Ternstroemiaceae, Leguminosae, laurels, oaks and figs, with Dilleniaceae, Sapotaceae and nutmegs.
David's good fortune did not desert him; he won his wife, and in this new advancement continued to grow in the popular favour, and to gain fresh laurels in the field.
Among the many varieties of trees and plants found are the date palm, mimosa, wild olive, giant sycamores, junipers and laurels, the myrrh and other gum trees (gnarled and stunted, these flourish most on the eastern foothills), a magnificent pine (the Natal yellow pine, which resists the attacks of the white ant), the fig, orange, lime, pomegranate, peach, apricot, banana and other fruit trees; the grape vine (rare), blackberry and raspberry; the cotton and indigo plants, and occasionally the sugar cane.