Drosera comprise one of the largest genera of carnivorous plants. They lure, capture, and digest insects using mucilaginous glands covering their leaf surface. The insects are used to supplement the poor mineral nutrition of the soil in which they grow.
I took these pictures in the Botanical Garden in Leiden, and you can clearly see the glandular tentacles, topped with sticky secretions, that cover their leaves.
The trapping and digestion mechanism usually employs two types of glands: some glands secrete sweet mucilage to attract and ensnare insects and enzymes to digest them, and some others that absorb the resulting nutrient soup.
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