. Plant life, considered with special references to form and function. Plant physiology. FEKNWORTS AND SEED-PLANTS. 6i "cushion," as it is called, are produced the sexual organs. (See further under Reproduction, Part III.) 70. Reduction of gametophyte.—In a few of the fernworts the gametophyte is filamentous, or tuberous, and more or less. Fig. 75.—Sporophyte of a fern, Poly/'Odium vnl^a-re^ showing horizontal underground stem, bearing secondary roots and leaves. Natural size.—From Bessey. completely subterranean and colorless. Such prothallia derive their food from decaying plant-of
. Plant life, considered with special references to form and function. Plant physiology. FEKNWORTS AND SEED-PLANTS. 6i "cushion," as it is called, are produced the sexual organs. (See further under Reproduction, Part III.) 70. Reduction of gametophyte.—In a few of the fernworts the gametophyte is filamentous, or tuberous, and more or less. Fig. 75.—Sporophyte of a fern, Poly/'Odium vnl^a-re^ showing horizontal underground stem, bearing secondary roots and leaves. Natural size.—From Bessey. completely subterranean and colorless. Such prothallia derive their food from decaying plant-offal. In higher plants of this group the gametophyte becomes still further reduced in size and structurally simplified, until in some species it is hardly more than a few cells surrounding the sexual organs. These reduced forms grow by the use 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 Barnes, Charles Reid, 1858-1910. New York, H. Holt & company
Size: 1223px × 2043px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectplantphysiology
