Bactris campestris Venezuela, north to Trinidad and Tobago, across Guyana, Suriname and French Guiana, and into northern Brazil. It grows in open habitats—generally savannas and low-stature forests—on white sands, at low elevations. The palm heart of "B. campestris" is reportedly used to treat snake bites. Bactris campestris Bactris campestris is a small (1–5 m tall) spiny palm which grows in multi-stemmed clumps in savannas and low forests in northern South America from Colombia to the Guianas, Trinidad and Tobago, and northern Brazil. "Bactris campestris" grows in small, multi-stemmed clumps. The stems, which are tall and in diameter, are often sheathed by the
Geology of French Guiana the Paramaca series, which corresponds to a series of micaschists, aluminous paragneisses and black quartzites whose total thickness is about 1 km. The central granite massifs consist of granite plutons, granodiorites and quartz diorites dating from 2.05 to 2.15 billion years ago. The north of French Guiana corresponds to a synclinorium composed of the Paramaca series on which sandstone and fluviatile conglomerates lie unconformably. Shield rocks in Guyana are all dated between 1.6 and 2.5 billion years ago. The Quaternary lands are located in the northern part of Guyana, near the coast, unconformably on the Paleozoic lands. The coastal plains