. Introduction to botany. Botany. Fig. 110. Photograph of a Cabbage Butterfly caught by its legs in the corpuscula of two Asclepias flowers and unable to escape. chamber, they put forth pollen tubes which penetrate to the tips of the st)ies, and then turn down- ward and find their way to the ovules. A useful insect is rarely held in captivity by the flower, while weak insects, or their legs which have been pulled off in their strug- gle to free themselves, are often found hanging to corpuscula that have not been removed from their original places. Figures no and in illustrate instances of this
. Introduction to botany. Botany. Fig. 110. Photograph of a Cabbage Butterfly caught by its legs in the corpuscula of two Asclepias flowers and unable to escape. chamber, they put forth pollen tubes which penetrate to the tips of the st)ies, and then turn down- ward and find their way to the ovules. A useful insect is rarely held in captivity by the flower, while weak insects, or their legs which have been pulled off in their strug- gle to free themselves, are often found hanging to corpuscula that have not been removed from their original places. Figures no and in illustrate instances of this kind. Rarely, indeed, a honey bee, too eager in its search for nectar, becomes caught in many flowers at once, and is unable to extricate itself (Fig. 112). Figure 113 is a photo- micrograph of a pair of pollinia attached to their common corpusculum, and Figure 114 is a photograph of a bee's leg with four corpuscula and two pollinia attached. There the second corpusculum has caught on one arm from the first, and so Fig. III. Photograph of a Moth with its legs caught in the corpuscula of three Asdepias flowers, one leg having been pulled off in its vain efforts to extract the pollinia and 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 Stevens, William Chase, 1861-. Boston, D. C. Heath & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1902
