. My studio neighbors. Natural history. A FEW NATIVE ORCHIDS 183 anthers or pollen receptacle united to a stalk upon which the stigma is also placed, we have an orchid. The order is further remarkable, as Darwin first demonstrated in his wonderful volume " The. Fig. Stigma. Fertilization of Orchids," in that the entire group, with very few exceptions, are absolutely depend- ent upon insects for their perpetuation through seed. They possess no possible resource for self-fertilization in the neglect of these insect sponsors. Many of our common wild flowers, as perfectly and effectually
. My studio neighbors. Natural history. A FEW NATIVE ORCHIDS 183 anthers or pollen receptacle united to a stalk upon which the stigma is also placed, we have an orchid. The order is further remarkable, as Darwin first demonstrated in his wonderful volume " The. Fig. Stigma. Fertilization of Orchids," in that the entire group, with very few exceptions, are absolutely depend- ent upon insects for their perpetuation through seed. They possess no possible resource for self-fertilization in the neglect of these insect sponsors. Many of our common wild flowers, as perfectly and effectually planned for cross-fertilization as the orchids, do retain the reserve power of final .y^^-fertilization if unfertilized by foreign pollen. But the orchid has lost such power, and in the progress of evolution has gradually adapted itself to the insect, often to a particular species of insect, its sole sponsor, which natural selec-. 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 Gibson, W. Hamilton (William Hamilton), 1850-1896. New York and London, Harper & Brothers
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