Vermifuga corymbosa R. et P. Syst. (1798) 216. 
[Flaveria Contrayerba Pers. syn. 2 (1807) 489.] 
(chenapoya; contrayerba; matagusanos) 
Employed extensively in Peru, this plant is applied as a 
poultice to maggot-infested sores and to wounds of beasts. 
When pounded up with salt, it is more efficaceous in killing 
maggots in animals than when used alone. 
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