. Nature-study; a manual for teachers and students. Nature study. 33° NATURE-STUDY of geraniums, sweet peas, pansies, tomatoes, com, etc. In this way seed will be formed which, if properly ripened, will produce plants that have the combined or blended char- acteristics of the parents. This is callerl making hybrids. Manv choice flowers in greenhouses and gardens and new va- rieties of fruit are thus formed by the cross-pollination of nearly related, but different, plants. These pupils are old enough to make a study of the uni- sexual flowers of trees. Begin with the willows and cot- ton w o o
. Nature-study; a manual for teachers and students. Nature study. 33° NATURE-STUDY of geraniums, sweet peas, pansies, tomatoes, com, etc. In this way seed will be formed which, if properly ripened, will produce plants that have the combined or blended char- acteristics of the parents. This is callerl making hybrids. Manv choice flowers in greenhouses and gardens and new va- rieties of fruit are thus formed by the cross-pollination of nearly related, but different, plants. These pupils are old enough to make a study of the uni- sexual flowers of trees. Begin with the willows and cot- ton w o o d s. These come out early in the spring before the jack-in-the-puipit. jg^^g^ appear. The flowers are quite small, and are arranged in long drooping "lusters, which are called catkins. On some trees there re only staminate catkins, and on others only pistillate. The staminate flowers consist each of a little scale, under which are borne a number of short stamens. At first the scales are closelv overlapping, but as the flowers ma- ture the scales separate, and the stamens with their dust- like pollen appear. This is wafted to the pistillate flowers on other trees. The pistillate flowers similarly consist of. 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 Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons
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