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Gratiola viscidula originates from Northern America and is relatively new to the aquatic hobby. The somewhat ‘thorny’ appearance of the submersed form makes it very distinct and easily recognizable.
Gratiola viscidula is a small North American stem plant sold in the aquarium trade as Klebriges Gnadenkraut, or sticky hedgehyssop. Its narrow leaves form dense green shoots that can be maintained...
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