. Plant life, considered with special references to form and function. Plant physiology. 282 PLANT LIFE. vided to recei\-e it. The wall cell remains undivided and grows to form an unseptatc filament, called the "pollen tube" (fig-s. 317, 31S, 319, 321, 322, 323). In gymno-. FlG. 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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