The climate of Western Cuba is tropical with dry and wet seasons well pronounced, (Samek and Travieso, 1968).For Rev (1974) the Ecotone that corresponds to the region, is the termoxerochimenico of the varieties, dry (dry 5-6 months), moderately dry (3-4 months dry) and semi-dry (dry 1-2 months). However it is known today, mogotica of the Sierra de Los Organos, the Strip has Ecotone hot tropical type, with a dry season during the autumn until spring, with temperatures ranging from 22-24 C and precipitation between 1200 – 1800 mm (Novo and Luis, 1989). The soils of the mogotes in the Sierra de los Organos, although they are classified by the Department of soils of the delegation Provincial of the Ministry of agriculture, growing primarily as protorrendzinas and Red rendzinas, which is where most of the vegetation that occupies the slopes, walls and peaks, alluvial soils in the holes that are or have been crossed by fluvial currents may exist. I.4. 2 Flora and vegetation the Los Cruces mogote is a site that has not been frequented by the precursors of Botany in Cuba. After reviewing the herbaria of the National Botanical Garden (HAJB), the Institute of ecology and systematic of the Ministry of science, technology and environment (HAC) and the Institute top pedagogical Rafael Maria de Mendive, of Pinar del Rio (HPPR), failed to check surrounding areas this mogote were visited by Bro. Leon and Jorge Matossi, in March 1941, where they performed some specimens collected, including the endemic local Cnidoscolus bellator var.

bullatus. As regards vegetation, Leon (1946) refers to the cordillera de Los Organos district considering it consists of limestones Jurassic or Cretaceous, where the main representatives are: Gaussia princeps, Thrinax sp, Ekmanianthe actinophylla, Erythrina cubensis, Cnidoscolus platiandrus, Cnidoscolus bellator and a similar to a Palm, Spathelia Rutacea superb brittonii.