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Zea Mays by Herbert M. Prouty, 1886
Zea Mays by Herbert M. Prouty, 1886, Page 25
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23 of the latter, the epidermis not at all so. The case is different in the primary roots of the embryo, which are formed early and mostly so near the surface of the embryo, that a complete continuity is possible in all the tissue systems between stem and primary roots, but in grasses (and cone is a grass) and some other [phanerogams?] the first root arises so deep in the interior of the embryonal substance that it is enclosed in the fully developed embryo of the ripe seed by a thick sac-like layer of tissue (Plate II) which is ruptured on germination - Plate I fig. 2 - known as the root-sheath [(coleosliza)?].
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23 of the latter, the epidermis not at all so. The case is different in the primary roots of the embryo, which are formed early and mostly so near the surface of the embryo, that a complete continuity is possible in all the tissue systems between stem and primary roots, but in grasses (and cone is a grass) and some other [phanerogams?] the first root arises so deep in the interior of the embryonal substance that it is enclosed in the fully developed embryo of the ripe seed by a thick sac-like layer of tissue (Plate II) which is ruptured on germination - Plate I fig. 2 - known as the root-sheath [(coleosliza)?].
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