. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 315.—^Development of the embryo in I. echinospora var. BrauniL A, Median longi- tudinal section of a young embryo; B, four horizontal sections of a younger one; C, two vertical transverse sections of an older embryo; (, the ligula, X 300. and as the leaf grows divides regularly by walls in a manner compared by Hofmeister to the divisions in the gemmae of Marchantia. It finally forms a scale-like appendage about twelve cells in length by as many in breadth. Almost coincident with the first

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. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. Fig. 315.—^Development of the embryo in I. echinospora var. BrauniL A, Median longi- tudinal section of a young embryo; B, four horizontal sections of a younger one; C, two vertical transverse sections of an older embryo; (, the ligula, X 300. and as the leaf grows divides regularly by walls in a manner compared by Hofmeister to the divisions in the gemmae of Marchantia. It finally forms a scale-like appendage about twelve cells in length by as many in breadth. Almost coincident with the first appearance of the ligule a depression is evident, which separates the bases of the cotyle- don and root. The base of the latter, which now begins also to. 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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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910