. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. Fig. 363. Fig. 364. hollowed out into two marked cavities, containing a mucilaginous matter (figs. 352, 353). In these cavities cells make their appearance —the outer small (figs. 352, 353, q>), forming ultimately the en- dothecium (fig. 350 cf); the interior layer forming cells in which the pollen is produced (figs. 352, 353, up). As the cavities become larger, the layer of cells (figs. 352, 353, ci) between the endothecium, cp, and exothecium, ce, is gradually abs
. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. Fig. 363. Fig. 364. hollowed out into two marked cavities, containing a mucilaginous matter (figs. 352, 353). In these cavities cells make their appearance —the outer small (figs. 352, 353, q>), forming ultimately the en- dothecium (fig. 350 cf); the interior layer forming cells in which the pollen is produced (figs. 352, 353, up). As the cavities become larger, the layer of cells (figs. 352, 353, ci) between the endothecium, cp, and exothecium, ce, is gradually absorbed more or less completely, forming at first septa in the cavities; and ultimately the anther assumes its mature form, consisting of two lobes with their mem- branous coverings (fig. 354 I). In the young state there are usually four cavities produced, two for each anther-lobe, separated by the conmetive, and each divided by Fig. 351. Transverse section of an anther of Cuourbita Pepo, or Gourd, taken from a tad aljont two millimetres, or l-12tli of an English inch, in length. Pig. 352. Similar hori- zontal section from a tad in a more advanced state, ce. Outer layer of cellules (EwtJieGi/mn^ forming the epidermis, ci. Intermediate layer of cellules in several layers, most of wliich are ultimately absorbed, cp. Internal layer of ceUs (Eniothecmm). up, Anther-cavities filled with large cells, which constitute the iirst state of the poUen-utricles, or pollinic cells. Fig. 353. Similar section in a still more advanced state. The letters as in the last figure. Fig. 864. Anther of the Almond-tree. 1. Seen in front. 'X Seen behind. //, Filament attached to the connective, c, by a point. 11, Anther-lobes containing 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 Balfour, John Hutton, 1808-1884. Edinburgh
Size: 1784px × 1400px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
