Nature and development of plants . B Fig. 82. Structure of the seed: A, section of an ovule of peppergrassin which the growth of the embryo is nearly complete—/, stalk or funiculusattaching ovule to wall of ovary; mi, micropyle; i, integument; en, re-mains of endosperm. The embryo consists of a stem which is differen-tiated into a hypocotyl. hy, that ends below in a root, r, and root cap, andabove in an epicoty] (the plumule), pi, and two cotyledons, c, which curveover and lie one upon the other, v, vascular bundles which extend upthrough the stem into the cotyledons where they subdivide, form
Nature and development of plants . B Fig. 82. Structure of the seed: A, section of an ovule of peppergrassin which the growth of the embryo is nearly complete—/, stalk or funiculusattaching ovule to wall of ovary; mi, micropyle; i, integument; en, re-mains of endosperm. The embryo consists of a stem which is differen-tiated into a hypocotyl. hy, that ends below in a root, r, and root cap, andabove in an epicoty] (the plumule), pi, and two cotyledons, c, which curveover and lie one upon the other, v, vascular bundles which extend upthrough the stem into the cotyledons where they subdivide, forming a net-work of veins. B, section of seed of water lily, after Conard—c, embryosurrounded by a layer of endosperm cells; mg, cells of the nucellus; i,integument. the coats of the integument, as in the castor bean, morning glory,onion, etc. (Fig. 85, D). The embryo may remain comparativelysmall as in the cases just cited or it may in turn absorb andreplace all the cells of the endosperm and so come to occupythe space within t
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectplants
