. The algae. Algae. s cp. Fig. 145 Callithamnion. A-G, stages in development of Cystocarp from mature Carpogonium. a = auxiliary cell, cp = carpogonium. s = sporogenous cell cut off from fertilized carpogonium. sc == sup- port cell. H, antheridia with spermatia. I, the same enlarged. J, antheridial sori. K, young tetrasporangium. L, mature tetra- sporangium (A-F, x 520; G, x 300). (A-G, after KyUn; H-J, after Grubb; K, L, schematic after Mathias.) Strands are apparently capable of some movement their function is obscure. The antheridia, which form hemispherical or ellipsoidal tufts on the bran
. The algae. Algae. s cp. Fig. 145 Callithamnion. A-G, stages in development of Cystocarp from mature Carpogonium. a = auxiliary cell, cp = carpogonium. s = sporogenous cell cut off from fertilized carpogonium. sc == sup- port cell. H, antheridia with spermatia. I, the same enlarged. J, antheridial sori. K, young tetrasporangium. L, mature tetra- sporangium (A-F, x 520; G, x 300). (A-G, after KyUn; H-J, after Grubb; K, L, schematic after Mathias.) Strands are apparently capable of some movement their function is obscure. The antheridia, which form hemispherical or ellipsoidal tufts on the branches, arise as lateral appendages, the first cell to be cut off being the stalk cell. This stalk cell gives rise to a group of secondary cells which later on divide to form branches composed of two to three cells, each terminating in an antheridial mother cell. In this genus there may be two or even three crops of antheridia arising successively in the same place, each mother cell producing about three antheridia in every crop. The cystocarps, which are usually present in pairs and enclosed in a gelatinous envelope, arise as 255. 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 Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
Size: 1585px × 1577px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
