Archive image from page 452 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 Fig. 605. The sexes; pistil- late spike or ear, stami- na te panicle or tassel. B26 Fig. 606. Ears too high on the left; on the right,ears well placed. Kernels. — The caryopses or kernels of corn (Fig. 596), re- sulting from the act of fertili- zation, are arranged in even- numbered rows on the fleshy axis, or cob, surrounded by the husk. Each husk represents the sheathing leaf base a
Archive image from page 452 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907 Fig. 605. The sexes; pistil- late spike or ear, stami- na te panicle or tassel. B26 Fig. 606. Ears too high on the left; on the right,ears well placed. Kernels. — The caryopses or kernels of corn (Fig. 596), re- sulting from the act of fertili- zation, are arranged in even- numbered rows on the fleshy axis, or cob, surrounded by the husk. Each husk represents the sheathing leaf base and the outer ones are usually tipped by a green, rudimentary leaf-blade, which occasionally displays a ligule: The outer, innermost husk is two-keeled, like a sled with runners, and thus it accommo- dates itself to the flattened or hollowed-out stem surface. Occasionally smaller ears are enclosed by the outer husks, so that the ear together with the husks is to be regarded as a short, axillary, branch bearing reduced leaves and flowers. Each caryopsis has two distinct coats, viz., the ovarian wall and the seed-coats. On microscopic section, the cell layers composing the ovarian wall, or pericarp, and the extremely thin seed-coats are distinctly visible. The reserve food in corn is horny proteinaceous material and mealy starch, while the embryo itself contains the largest amount of oil. The proteinaceous and starchy reserve foods comprise the albumen, which touches the embryo on the whole of one side, where the scutellum is found. The corn embryo, chit or germ, consists of the radicle surrounded by a root-sheath, or coleo- rhiza, a short hypocotyl from which arises the suck- ing organ, or scutellum, and a single cotyledon that surrounds several tightly-rolled plumular leaves. The epidermal cells of the scutellum secrete an enzyme which transforms the reserve food into a usable form when the embryo begins to Fig. 604. Squaw com grown in Manitoba. Sec- tion at a shown below. gro
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