Characters.—Floral envelopes, if present, whorled.
This sub-class includes all the remaining orders of endogens, which may be arranged in two subdivisions.
The Elements of Materia Medica and Therapeutics, Vol. II, 3th American ed., was written by Jonathan Pereira in 1854.
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.