. Nature-study; a manual for teachers and students. Nature study. 35° NATURE-STUDY are covered with spines, recurved hooks, etc. to catch into the fur of animals and the garments of people. Plants with burs arc found abundantly where animals go, in the past- ures, along the fences and roadsides, around barns. There we find cocklebur, bur- dock, sandbur, pitch- forks, beggar's-lice, tick- trefoil, etc. Even the barbs or beards of grasses and grains act hke burs. This is well seen in barley and in the sfjuirrel-tail grass. In the latter each grain is provided with several long, slender, barbed a
. Nature-study; a manual for teachers and students. Nature study. 35° NATURE-STUDY are covered with spines, recurved hooks, etc. to catch into the fur of animals and the garments of people. Plants with burs arc found abundantly where animals go, in the past- ures, along the fences and roadsides, around barns. There we find cocklebur, bur- dock, sandbur, pitch- forks, beggar's-lice, tick- trefoil, etc. Even the barbs or beards of grasses and grains act hke burs. This is well seen in barley and in the sfjuirrel-tail grass. In the latter each grain is provided with several long, slender, barbed awns. When the head is ripe it breaks up into the separate grains. Passing animals catch the barbed awns and the seed is scattered. The wind, however, may blow these light grains, the barbs acting as sails. Along almost every country lane and the roadways leading from the cities into the country we may see these bur weeds migrat- ing. The cattle, sheep, horses, dogs, and men passing along assist them on the way. Burs have learned the trick of steal- ing rides. Man has carried the seeds of cultivated plants from one end of the globe to the other. Wherever he goes he takes. 145. 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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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkcscribnerss
