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pollination

(Encyclopedia)pollination, transfer of pollen from the male reproductive organ (stamen or staminate cone) to the female reproductive organ (pistil or pistillate cone) of the same or of another flower or cone. Polli...

Sprengel, Christian Konrad

(Encyclopedia)Sprengel, Christian Konrad krĭsˈtyän kônˈrät shprĕngˈəl [key], 1750–1816, German botanist. Although director of a school at Spandau and tutor in Berlin, he devoted himself chiefly to the st...

stamen

(Encyclopedia)stamen, one of the four basic parts of a flower. The stamen (microsporophyll), is often called the flower's male reproductive organ. It is typically located between the central pistil and the surround...

Kölreuter, Joseph Gottlieb

(Encyclopedia)Kölreuter or Koelreuter, Joseph Gottlieb both: yōˈzĕf gôtˈlēp kölˈroiˌtər [key], 1733–1806, German botanist. In 1764 he became professor of natural history and director of the botanical g...

date

(Encyclopedia)date, name for a palm (Phoenix dactylifera) and for its edible fruit. Probably native to Arabia and North Africa, it has from earliest times been a principal food in many desert and tropical regions. ...

pollen

(Encyclopedia)pollen, minute grains, usually yellow in color but occasionally white, brown, red, or purple, borne in the anther sac at the tip of the slender filament of the stamen of a flowering plant or in the ma...

gibberellins

(Encyclopedia)gibberellins jĭbˌərĕlˈĭnz [key], a group of growth-regulating substances of plants, having complex chemical structure, of which the best known, gibberellic acid, is noted for its promotion of st...

petal

(Encyclopedia)petal, one of the four basic parts of a flower, next innermost organ from the sepal. The whorl of petals is known collectively as the corolla [Lat.,=little crown]. The number of petals is usually cons...

Pinophyta

(Encyclopedia)Pinophyta pīˌnŏfˈətə [key], division of the plant kingdom consisting of those organisms commonly called gymnosperms. The gymnosperms, a group that includes the pine, have stems, roots and leaves...

cone, in botany

(Encyclopedia)cone or strobilus strŏbˈələs [key], in botany, reproductive organ of the gymnosperms (the conifers, cycads, and ginkgoes). Like the flower in the angiosperms (flowering plants), the cone is actual...

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