. A text-book of elementary botany. Botany. Fig. 73. Fig. 74. Fig. 75. Fig. 76. their bodies from the end of the protracted stigma (Fig. 74). The stigmatic surface finally becomes exposed (Figs. 75, 76). It is evident that self-pollination is impossible; and cross- pollination by the insects, which transport the pollen from flowers in the first stage of maturity to those in the second stage, must take place. 9. Dimorphism (Gr. di, two; morphe, form) denotes the ex- istence of two kinds or forms of hermaphrodite flowers of the same species. It is often an adaptation for intercrossing. An exampl
. A text-book of elementary botany. Botany. Fig. 73. Fig. 74. Fig. 75. Fig. 76. their bodies from the end of the protracted stigma (Fig. 74). The stigmatic surface finally becomes exposed (Figs. 75, 76). It is evident that self-pollination is impossible; and cross- pollination by the insects, which transport the pollen from flowers in the first stage of maturity to those in the second stage, must take place. 9. Dimorphism (Gr. di, two; morphe, form) denotes the ex- istence of two kinds or forms of hermaphrodite flowers of the same species. It is often an adaptation for intercrossing. An example is furnished by the Houstonia. One set of flowers has long stamens and a short pistil (Fig. 77), and the other set has short stamens and a long pistil (Fig. 78). A bee visiting the different flowers would brush some part of its body against. 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 Kellerman, William Ashbrook, 1850-1908. Philadelphia, Eldredge & Brother
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
