. Elements of biology; a practical text-book correlating botany, zoology, and human physiology. Biology. 1 1 ^ , 1 ^tM^KKb^-y^i^w^M-^--;Si^ ^â ,;.«.>.:;:^v:.;;«.a««i«.' â ^ B Flowers of the Lady Washington geranium showing the conditions of dichogamy; A, flower with stamens ripe, but with the stigma not ready to receive pollen ; B, the same flower at a later stage; the stamens have withered, but the stigma is now ready to receive pollen. (1) The stamens and pistils may be found in separate flowers, either on the same or on different plants. (2) The stamens may produce pollen be
. Elements of biology; a practical text-book correlating botany, zoology, and human physiology. Biology. 1 1 ^ , 1 ^tM^KKb^-y^i^w^M-^--;Si^ ^â ,;.«.>.:;:^v:.;;«.a««i«.' â ^ B Flowers of the Lady Washington geranium showing the conditions of dichogamy; A, flower with stamens ripe, but with the stigma not ready to receive pollen ; B, the same flower at a later stage; the stamens have withered, but the stigma is now ready to receive pollen. (1) The stamens and pistils may be found in separate flowers, either on the same or on different plants. (2) The stamens may produce pollen before the pistil is ready to receive it, or vice versa. This condition is called dichogamy. Examples may be found in several of the flowers recommended for study. (3) The stamens and pistils may be so placed with reference to each other that pollination can be brought about only by outside assistance. In some flowers, as is shown by the prim- ula of our hothouses, the stamens and pis- tils are each of two different lengths in dif- ferent flowers. Short styles and long or high- placed filaments are found in one flower, ^ J. , , , ., and long styles with Condition of stamens and pistils in the spiked loosestrife i i i (.Lythrum salicaria), short 01 low - placed. 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 Hunter, George William, 1873-1948. New York, American book company
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