Botanical name:
569. PTEROCAULON PYCNOSTACHYON Elliott.—BLACK ROOT. Leaves used by the Indians as an alterative. Dose: 15 to 30 gr. (1 to 2 Gm.).
Henriette's Herbal Homepage
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Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.