Infertile

(1) Infertile [ Biology ]	Dictionary of botanic terminology - index of names


	Of a living being incapable of reproducing ( sterile , infertile ), not producing or incapable of producing offspring.

(2) Infertile [ Botany ]
Synonyms: Sterile, Unfertile, Fruitless, Unfruitful, Acarpous


	Used for plants or their parts. Not producing or incapable of producing seed, fruit, spores, or other reproductive organs.

For example a plant whit barren, not functional sexual parts, as, a sterile flower (sterile specimen= one without flowers).

Absolute sterility (infertility): complete and irremediable inability to produce offspring.
Female sterility (infertility): inability of the female part of a plant (gynoecium) to accept pollen as a result of a structural or functional defect in the reproductive organs. (also called "pod-sterile" plants)
Male sterility (infertility): inability of the male part of a plant to fertilize the ovule of another plant as a result of failure to produce living pollen. (also called "pollen-sterile" plants)

(3) Infertile [ Agronomy - Ecology ]
Synonyms: Sterile, Unfertile.


	*Poor soil, land or environment lacking the elements necessary for plant growth, in which plant won’t grow well.*

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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