Plant communities of a savanna in northern Bolivia II. Palm swamps, dry grassland, and shrubland
Savanna grassland, shrubland, and palm swamps in northern Bolivia were studied and a phytosociological classification of this vegetation is proposed. Two community clusters, syntaxa of the highest level of a hierarchical system, were distinguished. 1. The Schizachyrium sulcatum-Cuphea odonellii community cluster consists of two subdivisions which represent the shrub and bunchgrass dominated vegetation of the floodplain margins (1.1 Gymnopogon-Andropogon lateralis subdivision) and the vegetation of palm swamps (1.2 Ludwigia nervosa-Xyris macrocephala subdivision). 2. The Leptocoryphium lanatum-Trachypogon plumosus community cluster comprises both, savanna grassland (2.1 Paspalum ioanthum subdivision) and shrubland (2.2 Curatella americana-Xylopia aromatica subdivision). Most of the 13 communities which form the subdivisions of the community clusters were further divided into two or more subtypes. The structure and floristic composition of several communities is more similar to savanna vegetation in northern South America than to that of southeastern Bolivia and southern Brazil.