. Plant life, considered with special references to form and function. Plant physiology. Fig. 271.—Pollen grains. A, white water lily {A'yin^hfen n/da), B, athistle {Cirsiuiu nentornle). C,z mallow ^Hibiscus ternains). IJ, dandelion {Ta-J'axacuin offi- ciitale). Magnilied 200 diam.—After Kerner. £", pine, showing bladderj' enlarge- ments, [', h, of the outer layer of the cell-wall. The central portion is the body of the spore filled with protoplasm with a large nucleus. From it is separated a leiiticular cell,/, the rudiment of the gametophyte. Magnified 400 diam.—.After Strasburger. are
. Plant life, considered with special references to form and function. Plant physiology. Fig. 271.—Pollen grains. A, white water lily {A'yin^hfen n/da), B, athistle {Cirsiuiu nentornle). C,z mallow ^Hibiscus ternains). IJ, dandelion {Ta-J'axacuin offi- ciitale). Magnilied 200 diam.—After Kerner. £", pine, showing bladderj' enlarge- ments, [', h, of the outer layer of the cell-wall. The central portion is the body of the spore filled with protoplasm with a large nucleus. From it is separated a leiiticular cell,/, the rudiment of the gametophyte. Magnified 400 diam.—.After Strasburger. are old enough to release the sjjores, the latter ha\e already germinated and begun to form a new sexual pjlant, the male gametophyte. Thus the spores of the plant give. 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 Barnes, Charles Reid, 1858-1910. New York, H. Holt & company
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectplantphysiology
