. The structure and development of mosses and ferns (Archegoniatae). Fig. 6.—^A, B, Young embryos of R. glauca in longitudinal section, showing theventer of the archegonium, X260; C, transverse section of a similar embryo,X260; D, longitudinal section of the archegonium and enclosed embryo of at a later stage, X220; m, the sterile cells of the sporogonium. and densely granular contents. The nucleus is not so large asis usually the case in cells of similar character, and, except thenucleolus, stains but slightly with the ordinary nuclear the fresh state these spore mothe
. The structure and development of mosses and ferns (Archegoniatae). Fig. 6.—^A, B, Young embryos of R. glauca in longitudinal section, showing theventer of the archegonium, X260; C, transverse section of a similar embryo,X260; D, longitudinal section of the archegonium and enclosed embryo of at a later stage, X220; m, the sterile cells of the sporogonium. and densely granular contents. The nucleus is not so large asis usually the case in cells of similar character, and, except thenucleolus, stains but slightly with the ordinary nuclear the fresh state these spore mother cells are absolutely opaque,owing to the great amount of granular matter, largely drops ofoil, that they contain. In embedding these in paraffine,however, the oil is dissolved and removed, and microtomesections show the fine granules of the cytoplasm arranged in anet-like pattern, the spaces between probably being occupiedby oil in the living cells. II MUSCINE^—HEPATIC^—MARCH ANTI ALES 35 Fig. 7, A shows the nucleus of the mother cell under-going the first
Size: 1302px × 1919px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
