Latitude--and I might say altitude--however, changes the appearance of
the land. Rarely on the tableland of Equatorial Africa do we see the
scrub and thorn trees of South Africa. The vegetation there is more
robust, the trees taller, the leafage thicker and of a darker green; the
mere grasses of the tropics are taller than the trees growing on the
plains of Cape Colony, Bechuanaland, and Rhodesia, though in the latter
country there are oases favourable to the growth of noble timber. In
nitrous belts--fortunately of no great width--in Ugogo, Nyasaland, East
Africa, we should be reminded of the thorny productions of Bechuanaland,
and ten degrees north of the Equator we should again see a recurrence of
them.