20
40
60
80
Cranberry
Curare
Dandelion
Willow
Sweet Annie
25
50
75
100
plants
herbs
lichens
all of these are studied by botanists
Aspirin
Willow Bark
Both of these.
Neither of these.
Trial and error
Local doctor
Watching animals
Artemisia Annua
200
300
400
mountain tops
jungles
oceans
your back yard
everywhere