Tonga, Dipterix odorata.

Seeds of Coumarouna-a tree in Guiana.

Useful in neuralgia; pertussis.
Head.--Tearing pain in supra-orbital nerve, with heat and throbbing pain in head and epiphora. Confused, especially the occiput, with somnolence and a sort of intoxication. Trembling in right upper lid. Coryza; nose stopped, must breathe through mouth.
Extremities.--Tearing pains in hip-joints, femur, and knee, especially left side.
Relationship.--Melilotus. Anthoxanthum, Asperula, and Tonga contain Coumarin, the active principle. Compare them in hay-fever; also, Trifol; Napth; Sabad.
Dose.--Tincture and lower potencies.

Boericke's Materia Medica, 1901, was written by William Boericke. Excerpt: The Tinctures.