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Question

Velamen of orchid is formed from

A
Phelloderm
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B
Phellogen
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C
Dermatogen
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D
Cortex
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Solution

The correct option is B Dermatogen
Velamen is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants, such as orchid and Clivia species. Velamen are formed from root dermatogen. The velamen of an orchid is the white or gray covering of aerial roots. It is many cell layers thick and capable of absorbing atmospheric moisture and nutrients. Thus, the correct answer is option C.

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