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Algae in the shallows. Säppi, Finland. Wild. 2000-08-16.
Algae in the shallows. Tammisaari archipelago, Finland. Wild. 2004-08-01.
You can see why it's gut weed: it's just tubes, filled with air. Tammisaari archipelago, Finland. Wild. 2004-08-01.
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.