what is velamen root????
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the thick corky epidermis of aerial roots of an epiphytic orchid that absorbs water from the atmosphere.
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Velamen or velamen radicum is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants, such as orchid and Clivia species. ... Often, the roots of orchids are associated with symbiotic fungi or bacteria; the latter may fix nutrients from the air.
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