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Definition of velamen

Categorized under "General"

Definition as written by Monocromatico:

The outter layer of an orchid root. It is a thick, silvery/white, spongeous, sometimes paper-like structure filled with pores and empty spaces where certain fungi live (see "mycorrhiza"). These fungi are responsible for digesting the organic matter around the roots, making the minerals available for the orchid.

In orchids, a healthy root has generally a white velamen, and it becomes green when watered or humid.

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