. A handbook of cryptogamic botany. Cryptogams. Fig. 141.—Sexual organs of Kadnla complana-ta. a-r, archegone ; an, an- therld; b, leaf. (After Hofmeister.) Fig. i42.^yien£-ermaMnr'a biciispidcLttt L. Longi- tudinal section of immature sporogone, sg: ar, calypter ;. a-'y', unfertilised archegones ; /, base of perigyne ; si, stem ; b, leaf, (After Hofmeiscer.) After frequent divisions have taken place, the wall of the spore-capsule becomes differentiated from the inner tissue, out of which are developed the spores and elaters. There is no columel. By rapid extension of the hitherto short pedice
. A handbook of cryptogamic botany. Cryptogams. Fig. 141.—Sexual organs of Kadnla complana-ta. a-r, archegone ; an, an- therld; b, leaf. (After Hofmeister.) Fig. i42.^yien£-ermaMnr'a biciispidcLttt L. Longi- tudinal section of immature sporogone, sg: ar, calypter ;. a-'y', unfertilised archegones ; /, base of perigyne ; si, stem ; b, leaf, (After Hofmeiscer.) After frequent divisions have taken place, the wall of the spore-capsule becomes differentiated from the inner tissue, out of which are developed the spores and elaters. There is no columel. By rapid extension of the hitherto short pedicel, the calypter is ruptured at the apex, and the globular sporogone, containing the already ripe spores, becomes elevated. The inner of the two layers of which the wall of the sporogone is com- posed has become absorbed before the ripening of the spores; the single layer of cells which still remains is ruptured at the apex, and splits into four (rarely more) longitudinal valves, which separate suddenly in the form of a star, carrying with them at the same time the elaters, and thus bringing about the dispersion of the spores. The mature elaters are. 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 Bennett, Alfred W. (Alfred William), 1833-1902; Murray, George Robert Milne, 1858-. London, New York, Longmans, Green, and Co.
Size: 1416px × 1764px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondonnewyorklongm
