Oligoneuron:
Oligoneuron album:
Oligoneuron album (Nutt.) Nesom, Asteraceae: See Solidago ptarmicoides (Torr. & A. Gray) B. Boivin.
Oligoneuron rigidum:
Oligoneuron rigidum (L.) Small, Asteraceae: See Solidago rigida L.
A herbal distance course
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.