The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etcof the Royal college of surgeons of Edinburgh, in the summer of 1872 . Fig. Fig. 20.—Vertical section of an orchis root, highly magnified. The cells, c, graduallypass into dotted cells and vessels, fp, the extremity of the root, called a spongiole, sp.—Hal/our, p. 52. Fio. 21.— Magnified representation of two plants of Lemna minor, or lesser duckweed—the green mantle of pools—showing the extremities of the roots covered by a
The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etcof the Royal college of surgeons of Edinburgh, in the summer of 1872 . Fig. Fig. 20.—Vertical section of an orchis root, highly magnified. The cells, c, graduallypass into dotted cells and vessels, fp, the extremity of the root, called a spongiole, sp.—Hal/our, p. 52. Fio. 21.— Magnified representation of two plants of Lemna minor, or lesser duckweed—the green mantle of pools—showing the extremities of the roots covered by a cellular sheath(spongiole).— Fio. 22.— Monocotyledonous fibro-vascular bundle (from the spadix of Phoenix dacty-lifera). Vertical section, p, Parenchyma, in which the bundles lie; w, wood cells; s v,spiral vessels; d, reticulated ducts; vp, vasa propria; I, liber cells. Magn. 100 diani.—Henfrey. Points of Resemblance between the Vessels of Plants and Animals.—Making allowances for difference of opinion as to the functionperformed by the vessels of plants, there can be no doubtthat the vascular tissues of the vegetable kingdom, bear a closeanalogy to those of the animal kingdom. In the vessels ofplants we have s
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