. Elements of botany. Plants. I II III IV Fig. 153. — Provisions for Cross-Fertilization in the High Mallow. I, essential organs as found in the bnd ; II, same in the staminate stage, the anthers discharging pollen, pistils immature ; III, intermediate stage, siiy, the united stigmas ; IV, pistillate stage, the stigmas separated, stamens withered. just acquired will be lodged on the prominent stigmas and thus produce the desired cross-fertilization. Closely related flowers often differ in their plan of fertilization. The high mallow,, a plant cultivated for its purplish flowers, which has run
. Elements of botany. Plants. I II III IV Fig. 153. — Provisions for Cross-Fertilization in the High Mallow. I, essential organs as found in the bnd ; II, same in the staminate stage, the anthers discharging pollen, pistils immature ; III, intermediate stage, siiy, the united stigmas ; IV, pistillate stage, the stigmas separated, stamens withered. just acquired will be lodged on the prominent stigmas and thus produce the desired cross-fertilization. Closely related flowers often differ in their plan of fertilization. The high mallow,, a plant cultivated for its purplish flowers, which has run wild to some extent, is admirably adapted to secure cross-fertilization with its own pollen, since when its stamens are shed- ding pollen, as in Fig. 153, II, the pistils are incapable of receiving it, while when the pis- FiG. 154.—stamens and Pistils of ^ils are mature, as at IV, the stamens are Round-Leafed quite withered. In the common low mallow Mallow (the stig- • i • !.£*.' mas curled round 01 o^^* door-yards and waysides, insect lerti- among the sta- Hzation may occur, but if it does not the mens to admit of . r. n • , , -^a self-fertilization), curling stigiuas nnally come in contact with. 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; Bergen, Joseph Y. (Joseph Young), 1851-1917. Bergen's Botany: key and flora, Pacific coast ed. Boston : Ginn
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1896
