Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 650
but its essential structure always remains the same. Fromits under surface are developed not merely the rhizoids (a, b), whichserve at the same time to fix it in the soil and to supply it withmoisture, but also the antherids and archegones, which constitutethe true representatives of the essential… … Fig. 4(33.—Development of the antherids and anthe-rozoids of Pteris serrulata: A, projection of oneof the cells of the prothallium, showing the anthe-ridial cell b, with its sperm-cells e, within the cavityof the original cell a. B, antherid completelydeveloped; a, wall of antheridial cell; e,…
Microscopy
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