The country is watered by numerous streams bordered by magnificent tree-ferns, and by trees, shrubs, and plants requiring a large amount of water, while the dry hillsides bear noble pines standing at wide intervals and often arranged as if grouped by a skilled landscape artist.

During the rainy season they are covered with ferns and orchids, while exquisite white lilies, larger than Easter lilies, dot the hillsides.

The dense _cogon_ of the Philippine lowlands is absent.

Bamboo grass or _runo_ occurs sparingly in the immediate vicinity of streams and springs, but the hills are covered with a short grass seldom more than knee high, so that one may ride or walk over them in almost any direction with comfort.

A system of excellent horse trails affords communication with neighbouring provinces where one may see wonderful tropical vegetation, magnificent scenery, strange wild peoples, and the most remarkable terraced mountainsides in the world.