Common abbreviation for "open pollinated" in vine variety catalogues; see under open pollinated.
Term (also erratic block) for the natural fertilization of plant flowers, in English "open pollinated" (abbreviation O.P.). The stigmas of the flowers are fertilized "openly", i.e. in a natural way by wind, insects or self-pollination (without artificial help by humans). When the vine seeds are sown later, new offspring are produced, whose pollen donors (father variety) are not known a priori. Insects or wind may have caused cross-pollination with pollen from other varieties in the immediate vicinity, but also self-pollination (self-pollination). The father variety can only be suspected. Open-pollinated is in...