Columbia subject headings:
Harvard subject headings:
Botany, Medical--Amazon River Watershed.
Materia medica--Amazon River Watershed.
Plant communities--Amazon River Watershed.
Plants--Classification
Princeton subject headings:
Materia medica, Vegetable--Amazon River Region.
Materia medica, Vegetable--Brazil.
Medicinal plants--Amazon River Region--Classification.
Medicinal plants--Brazil--Classification.