. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. 210 COEOLLINE APPENDAGES. been called nectaries, are mere modifications of some part of the flower, especially of the corolla and stamens, produced either by degeneration or outgrowth, or by a process of dilamination (dis, separate, and lamina, a blade), or chm-isis {xu^'Z,i>', I separate). This process, called also deduplication, consists in the separation of a layer from the inner side of a petal, either presenting a peculiar form, or resembling the part from whic
. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. 210 COEOLLINE APPENDAGES. been called nectaries, are mere modifications of some part of the flower, especially of the corolla and stamens, produced either by degeneration or outgrowth, or by a process of dilamination (dis, separate, and lamina, a blade), or chm-isis {xu^'Z,i>', I separate). This process, called also deduplication, consists in the separation of a layer from the inner side of a petal, either presenting a peculiar form, or resembling the part from which it is derived. The parts thus pro- duced are not alternate with the petals or the segments of the corolla, but opposite to them. In these cases, the petals at the lower part consist of one piece, but where the limb and claw separate, or where the tube ends, the vascular layer splits into two, and thus two lamina are formed, one posteriorly and the other anteriorly. These scales are well seen in Lychnis (fig. 334 a), Silene, Cynoglossum, and Eanun- culus, and may be considered as formed in the same way as the ligule of grasses (fig. 210, p. 99). Corollas having these scaly appendages are sometimes denominated appendiculate. In other cases, as in Cus- cuta and Samolus, the scales are alternate with the petals, and may represent altered stamens. The formation of these scales is referred to under the section of Morphology and Symmetry. The parts formerly called nectaries are mere modifications of the corolla or stamens. Thus the so-called horn-like nectaries under the galeate sepal of Aconite (fig. 308, p. 202), are modified petals, so also are the tubular nectaries of Hellebore. The nectaries of Menyanthes and of Iris consist of hairs developed on the petals. Those of Parnassia (fig. 335 n), and of the Passion-flower, Stapelia, Asclepias, and Canna, are fringes, rays, and processes, which are probably modifications of stamens; and some consider the crown of Nar- cissus as consis
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