. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. ADHESION 51 be continued into a terminal point. They may be concave, as in Theo- broma (Fig. 71); the margin may be toothed and the apex toothed or fimbriated, as in Silene (Fig. 72); the toothing of the margin may extend into a pinnatifid condition, as in the calyx lobe of Rosa canina (Fig. 73), and that of a toothed or fimbriate apex into the cleft or divided state of chorisis. The Pappus.—The peculiarly divided calyx illustrated in Fig. 79, a, is denomi- nated a Pappus, and this
. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. ADHESION 51 be continued into a terminal point. They may be concave, as in Theo- broma (Fig. 71); the margin may be toothed and the apex toothed or fimbriated, as in Silene (Fig. 72); the toothing of the margin may extend into a pinnatifid condition, as in the calyx lobe of Rosa canina (Fig. 73), and that of a toothed or fimbriate apex into the cleft or divided state of chorisis. The Pappus.—The peculiarly divided calyx illustrated in Fig. 79, a, is denomi- nated a Pappus, and this term has been extended to all forms of the calyx (Figs. 74 to 83) existing in that family (the Compositae) and in some others. Fig. 80 illustrates the action of median, as well as of lateral chorisis, in the development of a double pappus, the outer circle being much shorter and different in kind. The several forms of perigone parts corresponding to those of leaves (see leaf-forms) and numerous inter- mediate ones not illustrated, should be carefully considered by the student, as they have a most important bearing upon the forms of the corolla produced by cohesion, which we shall shortly r/ r£ 7S. Fig. 71. Concave petal of Theobroma. 72. Flower of Silene, the petals toothed at apex and bearing a crown at junction of limb with claw; also a conspicuous anthophore in base of calyx. 73. Pinna- tifid sepal of 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 Rusby, Henry Hurd, 1855-. Philadelphia and New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1911
