. Elements of botany. Botany; Botany. 170 ELEMENTS OF BOTANY. earlier stage (above), but it cannot deposit any pollen on the stigmas which are unripe, shut together and tucked aside, out of reach. On flying to a flower in the later stage the pollen. II III IV Fia. 153. â Provisions for OrossrFertilization in the High Mallow. I, essential organs as found in the bud ; II, same in the staminate stage, the anthers discharging pollen, pistils immature; III, intermediate stage, siig, the united stigmas ; IV, pistillate stage, the stigmas separated, stamens withered. just acquired will be lodged on t
. Elements of botany. Botany; Botany. 170 ELEMENTS OF BOTANY. earlier stage (above), but it cannot deposit any pollen on the stigmas which are unripe, shut together and tucked aside, out of reach. On flying to a flower in the later stage the pollen. II III IV Fia. 153. â Provisions for OrossrFertilization in the High Mallow. I, essential organs as found in the bud ; II, same in the staminate stage, the anthers discharging pollen, pistils immature; III, intermediate stage, siig, 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- Fjg. 154.âstamens 'â ° ' ^ and Pistils of tils are mature, as at IV, the stamens are Eound-Leafed quite withered. In the common low mallow Mallow (the stig- mas curled round ot our door-yards and waysides, insect ferti- among the sta- Hzation may occur, but if it does not the mens to admit of self-fertilization), curling stigmas finally 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. Boston, Ginn
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1896
