| Strychnos toxifera | |
|---|---|
|   | |
| Botanical illustration | |
|  Scientific classification   | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Clade: | Asterids | 
| Order: | Gentianales | 
| Family: | Loganiaceae | 
| Genus: | Strychnos | 
| Species: | S. toxifera  | 
| Binomial name | |
| Strychnos toxifera | |
| Synonyms [2] | |
Strychnos syntoxicaSprague & Sandwith  | |
Strychnos toxifera, called bush rope and devil doer, is a species of flowering plant in the genus Strychnos , native to Costa Rica, Panama, Colombia, Ecuador, Venezuela, the Guianas, Brazil, Peru and Bolivia. [2] It is the principal source of calabash or gourd curare. [3]
Macusine B is an alkaloid inhibitor of adrenergic alpha-receptors and tryptamine receptors that can be isolated from Strychnos toxifera. [4]