. The evolution of plant life, lower forms. Cryptogams; Plants. 68 PLANT LIFE. i corolla large and showy for attractive purposes, whi|e the central or disc florets have the corolla much smaller, the stamens and pistil perfect, and produce the seeds. In all Cryptogams where the sexual organs of reproduc- tion are differentiated, water is the agent that enables the antherozoid or fertilizing body, which in the great majority of cases is motile, or possessed of the power of spontaneous. Fig. 12.—"Liverv/orl {.\fjrcAa/itm polymor/'Aa). A, an almost ripe anther- idium ; p, paraphyses ; B, anth
. The evolution of plant life, lower forms. Cryptogams; Plants. 68 PLANT LIFE. i corolla large and showy for attractive purposes, whi|e the central or disc florets have the corolla much smaller, the stamens and pistil perfect, and produce the seeds. In all Cryptogams where the sexual organs of reproduc- tion are differentiated, water is the agent that enables the antherozoid or fertilizing body, which in the great majority of cases is motile, or possessed of the power of spontaneous. Fig. 12.—"Liverv/orl {.\fjrcAa/itm polymor/'Aa). A, an almost ripe anther- idium ; p, paraphyses ; B, antherozoids (A x go, B x 600). (From Strasburger.) movement, to reach the oosphere or body to be fertilized. This statement is equally true of those groups of Crypto- gams that are established on dry land, as the mosses and ferns, where the sexual phase is developed during the winter or rainy season. The rigid adherence to this method by Cryptogams may possibly have to do with their distribu- tion, being as a body confined to damp forests and humid localities. With the evolution of Phanerogams the utilization of water as a means for enabling the pollen or fertilizing 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 Massee, George, 1850-1917. London, Methuen & Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1891
