Regulation to Govern the Management of Threatened and Endangered Species in the Commonwealth of Puerto Rico, 1985. No known commercial potential. Leaves are microphyllous, thick, and often limited to the tips of branches. C. Precipitation exceeds evapotransporation throughout the year but is lower than that received in the Luquillo Mountains of northeastern Puerto Rico. Most of the Central Cordillera is of volcanic origin, upper Cretacous.
Igneous rocks cover most of the area.
The Toro Negro area is part of the central mountain chain that bisects the island from east to west and the highest peaks are found here. Topography is rough and deeply dissected by streams. These soils are well to moderately well-drained, very strongly acid, clayey and overlay a thick layer of highly weathered rock. Ilex cookii occurs as a component of the dwarf or elfin forest of the Central Cordillera. Vines are much more common than in the elfin forest of the Luquillo Mountains.