. On the relation of phyllotaxis to mechanical laws. Phyllotaxis; Leaves. 40 RELATION OF PHYLLOTAXIS TO MECHANICAL LAWS. thus five-sided cells are produced at the ends of the segments, which on further orthogonal division render the system quite irregular (fig. 18; 8, 9). Spiral-vortex construction is thus almost entirely masked by secondary phenomena due to— (1) The shape of the iaitial Fig. 17.—Hypothetical log. spiral construction for 3 series of segments at an apex ; construction for 3-sided cells by circles, intersecting at 120° and 90°. (2) The effect of the individual growth of t
. On the relation of phyllotaxis to mechanical laws. Phyllotaxis; Leaves. 40 RELATION OF PHYLLOTAXIS TO MECHANICAL LAWS. thus five-sided cells are produced at the ends of the segments, which on further orthogonal division render the system quite irregular (fig. 18; 8, 9). Spiral-vortex construction is thus almost entirely masked by secondary phenomena due to— (1) The shape of the iaitial Fig. 17.—Hypothetical log. spiral construction for 3 series of segments at an apex ; construction for 3-sided cells by circles, intersecting at 120° and 90°. (2) The effect of the individual growth of the lateral members. (3) The effects of tensions produced by fused lateral contact. The effect of dividing up the initial cell into several initials segmenting contemporaneously would be to render the symmetry circular, and the formation of such a system of cell-division pro- ceeding from a single initial in a tissue-mass, in which circular. 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 Church, A. H. (Arthur Harry), 1865-1937; Church, Arthur Henry, Notes on phyllotaxis. London, Williams & Norgate
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