. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. from one to another. In the KaJmia blossom the anthers of the ten stamens are lodged in cavities in the co- rolla, and the filaments are curved backwards as the flower expands (Fig. 146). Bumble-bees, hovering over the flowers,'searching for nec- tar, liberate the stamens by occa- sional contact, which, in springing back straight, discharge the pollen from pores at the top of the anthers (Fig. 147). Some of the
. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. from one to another. In the KaJmia blossom the anthers of the ten stamens are lodged in cavities in the co- rolla, and the filaments are curved backwards as the flower expands (Fig. 146). Bumble-bees, hovering over the flowers,'searching for nec- tar, liberate the stamens by occa- sional contact, which, in springing back straight, discharge the pollen from pores at the top of the anthers (Fig. 147). Some of the pollen grains which strike the under side of the bumble-bee and adhere to it, will, when the next flower is approached, be deposited on its stigma, thus bringing about cross-fer- tilization. 146 147 8o. The most varied and wonderful contrivances for cross-fertilization are found in the family of Orchids (Fig. 148). The stamens are generally reduced to one, and this is united in a column with the pistil, indicated by the term gynandrous (Gr. guna, pistil; andres, stamens). The pollen in each anther- cell is united into a mass, and furnished with a little stem or caudicle, which has a very viscid disk (Fig. 148, III, IV, d). These two disks are so placed that when an insect visits the flower, and thrusts its proboscis into the spur for the nectar (as shown by the arrow. Fig. i4« Fig. 144. The coiled tip of the keel of a Bean-flower. Fig. 145. The terminal portion of the style of the same flower. Fig. 146. Flower of Kalmia lati/olia. Fig. 147. One of its stamens discharging poUen, slightly magnified. Fig. 14S. Orchid flower: /, flower entire; //, some parts removed; /// and IV, poUinia attached to a lead pencil; d, disk; /, poUinia; st^ stigma; AS., anther or poUen- sac; c/, caudicle; Illasii IV, slighdy Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illus
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1883
