. Foundations of botany. Botany; Botany. in nr IV Fig. 256.—Provisions for Cross-Pollination in the High Mallow. I, essential organs as found in the hud; II, same in the staminate stage, the anthers discharging pollen, pistils immature; HI, intermediate stage, stig, the united stigmas; lY, pistillate stage, the stigmas separated, stamens withered. Closely related flowers often differ in their plan of pollination. The high mallow, a plant cultivated for its purplish flowers, which has run wild to some extent, is admirably adapted to secure cross-pollination, since when its stamens are shedding
. Foundations of botany. Botany; Botany. in nr IV Fig. 256.—Provisions for Cross-Pollination in the High Mallow. I, essential organs as found in the hud; II, same in the staminate stage, the anthers discharging pollen, pistils immature; HI, intermediate stage, stig, the united stigmas; lY, pistillate stage, the stigmas separated, stamens withered. Closely related flowers often differ in their plan of pollination. The high mallow, a plant cultivated for its purplish flowers, which has run wild to some extent, is admirably adapted to secure cross-pollination, since when its stamens are shedding pollen, as in Fig. 256, II, the pistils are incapable of receiTing it, while when the pistils are mature, as at IV, the stamens are quite withered. In the common low mallow of our dooryards and waysides insect pollination may occur, but if it does not the curling stigmas finally come in con- tact with the projecting stamens and among the stamens receive pollen from them, as is indicated to admit of self-pol- . tti- n r rr itoation. in Fig. 257. Via. 267. —Stamens and Pistils of Bound- Leafed Mallow. The stigmas curled round. 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; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
