Accessory

Accessory [ Botany ]

Dictionary of botanic terminology - index of names


	Aiding the principal function or structure; contributory, supplemental, additional.

	All the supplementary parts or features of an organ or function added separately and not being an integral part which aid the functionality of the whole. Accessory parts – Structures consisting of, or derived from, parts other than the organ or structure to which they are associated, e.g. the fleshy hypanthium of a cactus flowers.

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Holdfast roots [ Botany ]
Dictionary of botanic terminology - index of names

Some species of climbing plants develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place.

Climbing plants, like the poison ivy (Toxicodendron radicans), Boston ivy (Parthenocissus tricuspidata), and trumpet creeper (Campsis radicans), develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place. Usually the Holdfast roots die at the end of the first season, but in some species they are perennial. In the tropics some of the large climbing plants have hold-fast roots by which they attach themselves, and long, cord-like roots that extend downward through the air and may lengthen and branch for several years until they strike the soil and become absorbent roots.

Major references and further lectures:
1) E. N. Transeau “General Botany” Discovery Publishing House, 1994