. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. Seed Plants: Angiosperms 317 such an extent that there are now hundreds of forms in culti- vation that bear little resemblance to the wild stock from which they were Fig. iqi. Flower clusters of dahlia, sunflower, and thistle, members of the composite family. The small flowers are collected in heads, which are characteristic of the family. In the United States the composites bloom chiefly in simamer and autimm, and often conspicuously color the landscape. The daisies, gold
. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. Seed Plants: Angiosperms 317 such an extent that there are now hundreds of forms in culti- vation that bear little resemblance to the wild stock from which they were Fig. iqi. Flower clusters of dahlia, sunflower, and thistle, members of the composite family. The small flowers are collected in heads, which are characteristic of the family. In the United States the composites bloom chiefly in simamer and autimm, and often conspicuously color the landscape. The daisies, goldenrods, and asters of the Eastern states and the sunflowers of the prairie states are weU known. The rag- weeds, which are troublesome as weeds, are one of the chief causes of hay fever. Their pollen is highly irritating to the mucous membrane of the nose, and it is advisable that city and village streets be kept clear of them. Many other famiHes of the dicots are of interest and im- portance, but descriptions of them must be sought in more speciaHzed botanical 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 Transeau, Edgar Nelson, 1875-1960. Yonkers-on-Hudson, N. Y. , World Book Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1921
