Ca. Buckwheat: The leaves of older plants, Eriogonum fasciculatum (Polygonaceae) was used to prepare a rather strong decoction for stomach disorders. This decoction was also effective as a diuretic and to effect uterine shrinkage in cases of dysmenorrhea.
Buckthorn:Buckthorn or Cascara Sagrada, Rhamnus californica (Rhamnaceae) was also very famous since it was used and still is used in American pharmacopoeia. The dried bark is used principally to cure constipation with laxative/purgative action.