. Botany of the living plant. Botany; Plants. Fig. 421. Pinus montana. A longitudinal section of a ripe male flower (xio). B, longitu- dinal section of a single stamen ( x 20). C, Transverse section of a stamen ( x 27). D, a ripe pollen grain of Pinus sylvestris. The obliterated prothallial cells are not shown. ( x 400.) (After Strasburger.) The male flower is thus a simple shoot bearing sporangia. The female flower may also be regarded as a simple shoot. It consists of an axis bearing numerous scales that are at first succulent, but finally. Fig. 422. Median section of ovule and scales in Pin
. Botany of the living plant. Botany; Plants. Fig. 421. Pinus montana. A longitudinal section of a ripe male flower (xio). B, longitu- dinal section of a single stamen ( x 20). C, Transverse section of a stamen ( x 27). D, a ripe pollen grain of Pinus sylvestris. The obliterated prothallial cells are not shown. ( x 400.) (After Strasburger.) The male flower is thus a simple shoot bearing sporangia. The female flower may also be regarded as a simple shoot. It consists of an axis bearing numerous scales that are at first succulent, but finally. Fig. 422. Median section of ovule and scales in Pine at time of pollination (after Coulter). b. sc=bract scale, ov. sc = ovuliferous scale. « = nucellus. t' = integument. tn = micropyle. = embryo-sac. As the two ovules lie side by side, only one of them is seen in the radial section. p = pollen-grain on nucellus. woody. They are arranged on a complex spiral plan. One of these scales removed from the young pink cone at the stage of pollination shows a double structure. A smaller lobe, sometimes called 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 Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. , ltd.
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