. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Flc. 3i6.^Three successive horizontal sections of a somewhat advanced embryo of f, echinospora var. Braunii, X260; R, root; cot, cotyledon; st, stem; I, ligula. to say just how many of them properly belong to the stem. So far as can be judged, the origin of the growing point of the stem is strictly secondary, and almost exactly like that of many Monocotyledons.^ Longitudinal sections of the embryo, when root and leaf are ^ See Hanstein's figures of Alisma, for example, in Goebel's Outlines, Fi

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Flc. 3i6.^Three successive horizontal sections of a somewhat advanced embryo of f, echinospora var. Braunii, X260; R, root; cot, cotyledon; st, stem; I, ligula. to say just how many of them properly belong to the stem. So far as can be judged, the origin of the growing point of the stem is strictly secondary, and almost exactly like that of many Monocotyledons.^ Longitudinal sections of the embryo, when root and leaf are ^ See Hanstein's figures of Alisma, for example, in Goebel's Outlines, Fig- 332-. 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 Campbell, Douglas Houghton, 1859-1953. New York, The Macmillan Company;

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