Oenothera tetragona:
Oenothera tetragona:
Oenothera tetragona Roth, Onagraceae: See Oenothera fruticosa L. ssp. glauca (Michx.) Straley.
Practical Herb Cards 2
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.