. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE PISTILS, OR GYNCECIUM. 103 515. The parts of a simple pistil are three, the ovary at base, the ftigma at the summit, and the style, intervening. Like the filament the style is not essential, and when it is wanting, the stigma is sessile upon the ovary, as in crowfoot. In order to understand the relation of those parts we must needs first study 516. The morphology op the pistil. As before stated, (§ 380), the pistil cons
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE PISTILS, OR GYNCECIUM. 103 515. The parts of a simple pistil are three, the ovary at base, the ftigma at the summit, and the style, intervening. Like the filament the style is not essential, and when it is wanting, the stigma is sessile upon the ovary, as in crowfoot. In order to understand the relation of those parts we must needs first study 516. The morphology op the pistil. As before stated, (§ 380), the pistil consists of a modified leaf called a carpel [KapTrdg, fruit), or carpel- lary leaf. This leaf is folded together (induplicate) toward the axis, so that the upper surface becomes the inner, while the lower becomes the outer surface of the ovary. By this arrangement two sutures or seams will be formed, the dorsal, at the back by the midvein, tne ventral, in front by the joined margins of the 3T8 bis 379 bis 885, bimplo pistil of Strawberry, the stylo lateral. 885, Simi]lo pistil of Crowfoot, cut to show the ovule. 830, Simple pistil of the Cherry, 881, Vertical section showing the ovule (o), style <s), stigma (a). 882, Cross-section of the same. 384, Compound pistil of 888, Cross-section of the same showing the 8 cells of the ovary. â 378, Expanded cai-pellary leaf of the double cherry. 879, The same partly folded as if to form a pistil. 517. Illusteatios. This view of the pistil is remarkably confirmed and illus- trated by the flowers of the double cherry, where the pistil may be seen in every degree of transition, reverting toward the form of a leaf. This carpeUary leaf stands in the place of the pistil, having the edges infolded toward each other, the midvein prolonged a,nd dilated at the apex. 518. If this be compared wilh the pistil of the cherry seen in the figure (378, .B79), no doubt can be entertained that the two sides of the loaf correspond to
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