. Introduction to botany. Botany. Pig. 104. Flower of lizard's-tail, -with no calyx or corolla After Engler adjacent cycles; that is, each petal opposite a space between tA\-o sepals, each stamen opposite a space between two petals, and so on. ^'ery often tliis alternate ar- rangement of the members of successive whorls is less evident Ijccause one or more whorls liave more numerous or fewer parts than the others, as in the case of the butter- cups and crowfoots (fig. 103), roses, and many other familiar flowers. In many cases, as in the knotgrass (fig. 125), only one set of floral leaves occu
. Introduction to botany. Botany. Pig. 104. Flower of lizard's-tail, -with no calyx or corolla After Engler adjacent cycles; that is, each petal opposite a space between tA\-o sepals, each stamen opposite a space between two petals, and so on. ^'ery often tliis alternate ar- rangement of the members of successive whorls is less evident Ijccause one or more whorls liave more numerous or fewer parts than the others, as in the case of the butter- cups and crowfoots (fig. 103), roses, and many other familiar flowers. In many cases, as in the knotgrass (fig. 125), only one set of floral leaves occurs. Such flow- ers are said to lack petals and are known as ajjetalouH. Some flowers, as those of the lizard's-tail (fig. 104) and the willow (fig. 105), are wholly destitute of calyx and corolla. 117. Staminate flow- ers and pistillate flowers. Such flowers as are shown ui figures 101-104, con- tainmg both stamens and pistils, are said to be hhexualJ Those which contam stamens but not pistils or pistils but not stamens, like those of the willow (fig. 105), are said t6 be unisexual. Many families of dicotyledon- ous trees and slxrubs, such as the ^A'illow fam- ily, the Oak family, and others, have unisexual. Fui. 105. Dioecious flowers of wliite willow {Salix alba) A, staminate catkin, natural size; B, pistillate catkin, natural size ; (7, staminate flower, mag- nified; J), pistillate flower, magnified. After Cosson and De Saint-Pierre 1 The flower itself is not sexual at all, as will appear later, but these terms ha^e come into general use, and their application to the two kinds of flower seems likely to 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; Caldwell, Otis William, 1869- joint author. Boston, New York, [etc. ] Ginn and company
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