. Elements of botany. Botany; Botany. Fig. 140 —Stigma of Thorn Apple (Datura) with Pollen (magnified). Fig. 141. — Part of Stigma of Thorn Apple. Vertical section (magni- fied), showing pollen tubes making their way toward the ovary. 191. Microscopical Structure of the Stigma and Style.— Under a moderate power of the microscope the stigma is seen to consist of cells arranged rather loosely over the surface, and secreting a moist liquid to which the pollen-grains adhere (rig. 140). Beneath these superficial cells and running down 1 The sweet pea pollen and that of Tropseolum are easier to mana
. Elements of botany. Botany; Botany. Fig. 140 —Stigma of Thorn Apple (Datura) with Pollen (magnified). Fig. 141. — Part of Stigma of Thorn Apple. Vertical section (magni- fied), showing pollen tubes making their way toward the ovary. 191. Microscopical Structure of the Stigma and Style.— Under a moderate power of the microscope the stigma is seen to consist of cells arranged rather loosely over the surface, and secreting a moist liquid to which the pollen-grains adhere (rig. 140). Beneath these superficial cells and running down 1 The sweet pea pollen and that of Tropseolum are easier to manage than any other kinds of which the author has personal knowledge. If a concaved slide is not available, the cover-glass may be propped up on bits of the thinnest broken cover- glasses. From presence of air or some other reason, the formation of pollen tubes often proceeds most rapidly just inside the margin of the 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
Size: 1474px × 1696px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1896
