Fourth.—Region of upper tropical forests, situated between 1500 to 2150 meters of altitude.
Fifth.—Region of oaks, from 2150 to 2750 meters in height.
Sixth.—Region of chaparrales, from 2750 to 3050 meters up.
Seventh.—Region of subalpine or subandine flora, from 3050 meters up to the tops of the high mountains.
Dr. Polakowsky enumerates cultivated lands, virgin forests, open forests and savannas.
Another division is given by Dr. Moritz Wagner. He mentions a littoral (as appears on next page) zone, a tropical forest zone and a zone of savannas.
He also distinguishes on the volcano of Chiriqui the following successive regions:
First.—Regions of evergreen forest trees and palms, bananas, Araceæ, etc., to a height of 550 meters, with an average temperature of 26° to 24° C.
Second.—Region of tree ferns and mountain orchids, from 550 to 1220 meters, with an average temperature of 23° to 18° C.
Third.—Region of Rosaceæ, Senecionodeæ, Gramineæ and Agave americana, from 1220 to 1585 meters.