. Elementary biology; an introduction to the science of life . Fig. 140. Pollenation by insects In the lady's slipper and in many other flowers, in- sects alighting on the co- rolla crawl into the interior, guided by the form and the markings. In many flowers the arrangement of the parts is such that the in- sect must brush against the stigma in going in, and against the anthers in pass- ing out. As a result the animal carries pollen from flower to flower. Many species of plants, especially among the orchids, depend upon single species of in- sects for their pollenation Fig. ;8). 362. Bird pol
. Elementary biology; an introduction to the science of life . Fig. 140. Pollenation by insects In the lady's slipper and in many other flowers, in- sects alighting on the co- rolla crawl into the interior, guided by the form and the markings. In many flowers the arrangement of the parts is such that the in- sect must brush against the stigma in going in, and against the anthers in pass- ing out. As a result the animal carries pollen from flower to flower. Many species of plants, especially among the orchids, depend upon single species of in- sects for their pollenation Fig. ;8). 362. Bird pollenation. Next to the wind, the most common moving agents that go from flower to flower are flying animals and birds and insects. Now we know that not all birds or all insects can serve plants as pollen carriers; only those that regularly visit flowers can be considered of importance in this connection. Certain humming birds that visit flowers lap up the sugary fluid, or
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology
