from The Century Dictionary.
- noun A very poisonous plant of Caracas, belonging to the Apocynaceæ, and probably Malouetia nitida. The poison appears to be a simple narcotic, very similar to curari in its action.
Sorry, no etymologies found.
In the neighbourhood of the Apoure, in Venezuela, a poisonous shrub abounds -- the deadly guachamaca -- belonging to the family of Apocinese, or dog-bane.
The Western World Picturesque Sketches of Nature and Natural History in North and South America William Henry Giles Kingston 1847