How the Plant Produces Seed . Fig. 99. two types of flowers in which pollination and cross-pollinationare effected by insect visitors A, Longitudinal section of violet flower, showing nectar (n) in the spur formed by the lower petal. Inreaching for the nectar the insect brushes against the stamens and the stigma, bringing about , Longitudinal section of ladys-slipper showing stigma (a) and stamen (b), which are rubbed againstby the bee as it attempts to escape from the pouch by the route indicated by the arrow flower from which the pollen comes must, as a general rule, be one of t
How the Plant Produces Seed . Fig. 99. two types of flowers in which pollination and cross-pollinationare effected by insect visitors A, Longitudinal section of violet flower, showing nectar (n) in the spur formed by the lower petal. Inreaching for the nectar the insect brushes against the stamens and the stigma, bringing about , Longitudinal section of ladys-slipper showing stigma (a) and stamen (b), which are rubbed againstby the bee as it attempts to escape from the pouch by the route indicated by the arrow flower from which the pollen comes must, as a general rule, be one of thesame species as the flower pollinated, tho not necessarily of the samevariety of that species. If the characters of the flowers that are pollinated thru the agencyof insects are compared with those of the flowers that are wind-pollinated,notable differences are seen at once. The wind-pollinated flowers are rela-tively inconspicuous; they have small petals or even none, and no decidedodor, and produce little or no nectar. Th
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Keywords: ., bookcentury1900, bookdecade1910, bookidhowplantprod, bookyear1914
