. Elements of botany. Plants. STRUCTURE OF THE FLOWER AND ITS ORGANS. 147 called the stigma. These parts are all shown in Fig. 128. In many pistils the stigma is borne directly on the ovary, as in Fig. 145. 182. Union of Stamens with each Other.— Stamens may be wholly unconnected with each other or distinct, or they may cohere by their filaments into a single group, when they are said to be monadel- phous, of-one-brotherhood, Fig. 129, into two groups (diadelphous), Fig. 130, or into many groups. In some flowers the stamens are held together in a ring by their coherent anthers, Fig. 131. 183.
. Elements of botany. Plants. STRUCTURE OF THE FLOWER AND ITS ORGANS. 147 called the stigma. These parts are all shown in Fig. 128. In many pistils the stigma is borne directly on the ovary, as in Fig. 145. 182. Union of Stamens with each Other.— Stamens may be wholly unconnected with each other or distinct, or they may cohere by their filaments into a single group, when they are said to be monadel- phous, of-one-brotherhood, Fig. 129, into two groups (diadelphous), Fig. 130, or into many groups. In some flowers the stamens are held together in a ring by their coherent anthers, Fig. 131. 183. Union of Pistils. — The pistils may be entirely separate from each other, distinct and simple as they are in the buttercup and the stonecrop, or several may join to form one compound pistil of more or less united carpels. In the latter case the union generally affects the ovaries, but often leaves the styles sep- arate, or it may result in joining ovaries and styles, but leave the stigmas separate or at any rate lobed, so as to show of how many separate carpels the compound pis- til is made up. Even when there is no external sign to show the compound nature of the pistil, it can usually be recognized from the study of a cross- section of the ovary. 184. Cell of the Ovary; Placentas. — Compound ovaries are very commonly several-celled, that is, they consist of a number of separate cells ^ or chambers. Fig. 132 B shows a ^ Notice that the word cell is here used in an entirely different sense from that in which it has been employed in the earlier chapters of this book. As applied to the ovary, it means a chamber or Fig. 123. — Salver-Shaped Corolla of Jasmine (magnified).. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917; Bergen, Joseph Y. (Joseph
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