
          They have poison (in Sonora) which is from
a certain tree the size of the apple. No more
is necessary for effect than to pluck the fruit
& moisten the arrow with it, or if there be no
fruit, to break a twig & with the milk from 
it to do the same. This tree is abundant, & so
deadly that if the leaves are bruised & steeped
in some neighbouring water, all the deer and 
other animals that drink of it soon burst.

From the "Naufragios" of A. [Alvar] Nuñez, Cabeza
de Vaca. For observation made 1536.

"On remarqua dans cet endroít un poison quí
d'après ce que l'on vit était le plus dangereux que
l'on pût trouver; c'était la sève d' un petit 
arbre semblable au lantisque, qui il vient dans
les terrains argileux.. Ils (les Indiens) ont des poisons
avec les quels ils tuèrent beaucoup de chrétiens"
Jaramillo 1540

"The yerba del benudo, & yerba de la
flecha; the latter used for intoxicating fish,
& by some tribes of Indians for poisoning
arrows"

N.B. You will observe that this last
speaks of two, though perhaps [added: the first] not
as poisonous.
        