. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. GALLS 143 plants ( those of the Finger and Toe disease, Fig. 135, or those produced by many Rust Fungi), and externally they commonly present an irregular and very variable form. Many animal galls offer a striking contrast in these respects, not only ex- hibiting a definite external structure, but, as in many of those produced by gall-flies, a complex internal differentiation. In. Fig. 70.—Pliotograph of galls (g.) on leaves of Dogwood (Coruiis sanguinea). [Photo E. J. S.] some of these cases the central
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. GALLS 143 plants ( those of the Finger and Toe disease, Fig. 135, or those produced by many Rust Fungi), and externally they commonly present an irregular and very variable form. Many animal galls offer a striking contrast in these respects, not only ex- hibiting a definite external structure, but, as in many of those produced by gall-flies, a complex internal differentiation. In. Fig. 70.—Pliotograph of galls (g.) on leaves of Dogwood (Coruiis sanguinea). [Photo E. J. S.] some of these cases the central region, where the larva of the gall-insect resides, consists of nutritive tissue composed of cells with dense cytoplasm, rich in protein material, and serving for the animal's nourishment. This region is in some cases sur- rounded by a la3'er of sclerenchj'ma, whilst the outermost zone consists of parenchymatous tissue. The latter is usually well supplied with intercellular spaces, contains little or no chloro- hyll, and is oiten traversed by vascular 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 Fritsch, Felix Eugene, 1879-; Salisbury, E. J. (Edward James), Sir, b. 1886. London, G. Bell and sons ltd.
Size: 1412px × 1770px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
