Epiphyte
/ˈɛpəˌfaɪt/
Definition
Epiphyte refers to a plant that grows on another plant for physical support without taking nutrients from it. Unlike a parasite, it does not feed on the host. Water and minerals come from rain, air, dust, and debris that collect around its roots. Many orchids, bromeliads, and some ferns are epiphytes, especially in humid forests where tree branches provide light and airflow.
Botanical Significance
- Canopy adaptation: An epiphyte is a common growth form in humid forests, where living on trunks and branches gives better access to light than the shaded forest floor.
- Specialized water capture: Many have traits that help them cope with brief drying, such as absorptive roots, leaf tanks, or water-storing tissues. In orchids, a velamen is a spongy outer root layer that rapidly absorbs moisture.
- Usually not parasitic: This habit does not mean a plant takes food from its host. The supporting tree mainly provides physical support, while water and nutrients come from rain, dust, and decaying organic matter.
- Useful in plant identification and care: Knowing a species is an epiphyte helps explain why it often prefers fast drainage, strong air movement, and less dense potting media than many soil-rooted plants.
Related Terms
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Velamen
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Orchidaceae
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Moss pole
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Tree fern fiber
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Orchid bark
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Humidity
Humidity is the amount of water vapor in the air around a plant, usually discussed as relative humidity, the percentage…