velamen (suomeksi)

Määritelmät:

(lb, en, anatomy) A covering membrane or velum
(lb, en, botany) A spongy, usually pale, multiseriate epidermis (i.e. consisting of multiple layers of cells) covering the roots of some kinds of plants, especially plant species with an epiphytic or semi-epiphytic habit. Examples include various orchid and Wikipedia:Clivia, Clivia species