. Heredity and evolution in plants. Heredity; Plants. 4 TIKREDITY AND EVOLUTION IN PLANTS leaves appear above ground.^ The stem may be branched or unbranched. When branched, the branches are pro- duced without reference to the insertion of the leaves, in contrast to the habit of higher plants of forming branches only in the upper angle (axil) between the stem and leaf-stalk. There is always a terminal btid at the. ).—A, Upper epidermis; B, lower epidermis of the leaf of the fern, Drynaria meyeniana. (Camera lucida drawing.) tip of the fern-stem (and of the branches when any oc- cur) ; and the
. Heredity and evolution in plants. Heredity; Plants. 4 TIKREDITY AND EVOLUTION IN PLANTS leaves appear above ground.^ The stem may be branched or unbranched. When branched, the branches are pro- duced without reference to the insertion of the leaves, in contrast to the habit of higher plants of forming branches only in the upper angle (axil) between the stem and leaf-stalk. There is always a terminal btid at the. ).—A, Upper epidermis; B, lower epidermis of the leaf of the fern, Drynaria meyeniana. (Camera lucida drawing.) tip of the fern-stem (and of the branches when any oc- cur) ; and the leaves are usually attached just back of this tip. The stems are commonly (though not always) covered by hairs or scales (Fig. i), and on their older portions, at some distance back from the tip, may be seen the scars, or the ends of leaf-stalks, left by old leaves that ' The leaves of ferns are often called Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's Son & Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1920
