The first principles of heredity; with 75 illustrations and diagrms . Fig. 14.—Diagram of a Flower.(After Prantl.) Ke, calix; K, corolla; /, stamen ;a, anther with pollen (p); F, ovary;g, pistil ; S, ovule ; em, embryosac ; i, integument of Fig. 15.—Catkins ofHazel. {From Oliver, Ele-mentary Botany.) S male ; ? femaleflowers. definite kind, either male or female, the union of boththese germs being essential for the procreation of the newgeneration. Among plants we find male and female germ-cells in allflowering species—the former, the pollen-grain, being de-veloped in the anther of the

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The first principles of heredity; with 75 illustrations and diagrms . Fig. 14.—Diagram of a Flower.(After Prantl.) Ke, calix; K, corolla; /, stamen ;a, anther with pollen (p); F, ovary;g, pistil ; S, ovule ; em, embryosac ; i, integument of Fig. 15.—Catkins ofHazel. {From Oliver, Ele-mentary Botany.) S male ; ? femaleflowers. definite kind, either male or female, the union of boththese germs being essential for the procreation of the newgeneration. Among plants we find male and female germ-cells in allflowering species—the former, the pollen-grain, being de-veloped in the anther of the stamen of the flower ; the latter,the ovule, lying in the ovary, to which the pistil flowers possess both sexual organs, stamen as well aspistil; but many flowers are uni-sexual, having either 22 THE FIRST PRINCIPLES OF HEREDITY stamen only or pistil only. When uni-sexual flowers ofboth kinds, male and female, are to be found on the sameplant, the plant is said to be mon-oecious (as oak, alder,

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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1910