
2026-02-06 1229词 困难
Parasitic plants are epiphytic too, but tillandsias are not parasites. Parasites draw nutrients up from the plants on which they sit, whereas air plants take nothing from their hosts. Instead, they draw nutrients from water. They take it in through little cells on their leaves called trichomes, hairy spots which give the leaves a textured look. Their roots merely allow them to hang on: they are fixatives, not extractors.
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