. Carnegie Institution of Washington publication. Fig. 135.—Young sporophyte of Angiopteris. A. Stem apex, showing single apical cell. X150. B. Second leaf, /".of same Fig. 1 }6. A. Nearly median section of a ymmg sporophyte of Kaulfussia. B. Another section of same, showing continuity of bundle: "I pr, game- cotyledon and root. / , second leaf; m, mucilage ducts; stt stem apex; tophyte. X about 20. C. The stem apex. tissue belonging either to the cotyledon or to the mot. In the older embryo of Mar alt 1 a douglasii the apex of the stem (fig. 139, B) is occupied by a gro
. Carnegie Institution of Washington publication. Fig. 135.—Young sporophyte of Angiopteris. A. Stem apex, showing single apical cell. X150. B. Second leaf, /".of same Fig. 1 }6. A. Nearly median section of a ymmg sporophyte of Kaulfussia. B. Another section of same, showing continuity of bundle: "I pr, game- cotyledon and root. / , second leaf; m, mucilage ducts; stt stem apex; tophyte. X about 20. C. The stem apex. tissue belonging either to the cotyledon or to the mot. In the older embryo of Mar alt 1 a douglasii the apex of the stem (fig. 139, B) is occupied by a group of rela- tively large cells, which at first sight seem to be pretty much alike; but a careful examination of these makes it probable that one of them may be considered as the real initial cell. This, in cross-section, appears almost square and shows a fairly regular segmentation. While it must be said that the segmentation is not so regular that one can assert without question that all of the meristem is really due to the activity of a single cell, I believe that this is probably the case. My own investigations of the stem apex in Angioptern have led to the conclusion that there is a single initial cell here also in the young sporophyte, although Farmer. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
Size: 1871px × 1336px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1911
