. Carnegie Institution of Washington publication. STRUCTURE. 29 The root-cap is said by Henslow (1892, p. 507-8) and Van Tieghem (1898) to resemble in structure that of monocotyls rather than dicotyls. In N. flavo-virens and N. caerulca, however, the tip of the root agrees exactly with the fourth type of structure given by De Bary (1884, p. 12),. .Fio. 6.—Longitudinal section of root-tip of N. eaerulta. a, air-canal: », space between root and upper portion of cap. From a photomicrograph. i. e., there is a transverse layer of initial cells from which all of the tissues are developed (Fig. 6). C
. Carnegie Institution of Washington publication. STRUCTURE. 29 The root-cap is said by Henslow (1892, p. 507-8) and Van Tieghem (1898) to resemble in structure that of monocotyls rather than dicotyls. In N. flavo-virens and N. caerulca, however, the tip of the root agrees exactly with the fourth type of structure given by De Bary (1884, p. 12),. .Fio. 6.—Longitudinal section of root-tip of N. eaerulta. a, air-canal: », space between root and upper portion of cap. From a photomicrograph. i. e., there is a transverse layer of initial cells from which all of the tissues are developed (Fig. 6). Caspary and Nicolai assert that the cap continues to grow only for a very short period, after which no farther addition to it is made, though it is persistent, and not deciduous as in Nuphar (De Bary 1884, p. 413). In a root of N. flavo-virens from a plant just breaking from a strong tuber, the cap is short-conical and rounded at apex, with. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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