Resumen

AVENDANO, Neida  y  CASTILLO, Aníbal. Catálogo de especies arbustivas de los bosques ribereños en el Área Acuo-Sipapo-Orinoco Medio, Municipio Autana, Estado Amazonas. Acta Bot. Venez. [online]. 2006, vol.29, n.2, pp.235-256. ISSN 0084-5906.

ABSTRACT A list of shrub species in the riparian forests of the Cuao-Sipapo area, the convergence of the Cuao and Sipapo rivers and the junction of the Sipapo with the Orinoco river is given. The study area was selected on ecological particularities, forest vegetation characteristics, hydrological variations presented by these rivers and their confluence zones; plus the chemical-physical characteristics of their water which allow the differentiation of three types of rivers (black, white and clear waters). Twenty-two families,46 genera and 74 species of shrubs were identified, including Chomelia volubilis, Piptocoma areolata, Psychotria vasivensis, Tococa lancifolia and Turnera castilloi, which are endemic to Amazonas state. Rubiaceae and Melastomataceae were the dominant families in species number, representing 51.34% of the species studied.

Palabras clave : Amazonas; Floristics; Riparian confluence zones; Riparian forest; Shrubs; Venezuela.