. Plant studies; an elementary botany. Botany. Fio. 136. Yucca and F/onitha. In the louer figure to the riglit :in opened flower shows the pendent ovary with the stignia region at its apex. Tlie npper ligure to the right shows the position of Pronuba when collecting pollen. The fignre to the left represents a cluster of capsules of Yucca, which shows the perforations made by the larvae of Pronuba in escajjing.—After Kiley and Tkelease. of their own length, and a transfer of pollen from flower to flower is nocfssary. 90. Self-pollination.—In considering these tliree general metliods of preventi
. Plant studies; an elementary botany. Botany. Fio. 136. Yucca and F/onitha. In the louer figure to the riglit :in opened flower shows the pendent ovary with the stignia region at its apex. Tlie npper ligure to the right shows the position of Pronuba when collecting pollen. The fignre to the left represents a cluster of capsules of Yucca, which shows the perforations made by the larvae of Pronuba in escajjing.—After Kiley and Tkelease. of their own length, and a transfer of pollen from flower to flower is nocfssary. 90. Self-pollination.—In considering these tliree general metliods of preventing self-pollination, it must not lie sup- posed tliat self-pollination is never provided for. It is pro- vided for more extensively than was once supposed. It is found tluit iiKtny ])lants, such ;is violets, in aildition to tlie usual sliowy, iusect-polliiiiited flowers, produce flowers that are not at all showy, in do not open, and are often not prominently iilaeed. 'Y\n\ fact that these flowers are often closed has suggested for tliem the name deistogamous. 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
