Click here for information about Crassula.
'Jade Necklace'. Plant. Botanical garden Kaisaniemi, Helsinki, Finland. Greenhouse. 2011-03-30.
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.