Biology / Bio 2597 · Atom · ~20 seconds
Epiphytes
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An epiphyte grows supported on another plant without drawing nutrition from it, absorbing moisture and minerals instead from rain, humus, and atmosphere.
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An orchid high in a tree canopy collects nutrients from humus in bark crevices, not the tree's tissue.
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An epiphyte's dependence on its host is purely structural — unlike a parasite, per Bio 2589, it draws no nutrients from it.