. Experiments with plants. Botany. 306 EXPSBIME^VTS WITH PLANTS showing the anther {an) with a bee entering and about to strike his head against the lower part of the anther- stalk. The stalk of the anther turns on a hinge or pivot, so that, when the lower part is struck, down flops the anther and discharges pollen all over the bee (Fig. 169, B). In the mean- time the stigma {st) is up out of the way, but when the pollen is all discharged it grows down and takes the po- sition shown in Fig. 169, C. When a bee en- ters such a flower the pollen is transferred di- rectly to the stigma. There are
. Experiments with plants. Botany. 306 EXPSBIME^VTS WITH PLANTS showing the anther {an) with a bee entering and about to strike his head against the lower part of the anther- stalk. The stalk of the anther turns on a hinge or pivot, so that, when the lower part is struck, down flops the anther and discharges pollen all over the bee (Fig. 169, B). In the mean- time the stigma {st) is up out of the way, but when the pollen is all discharged it grows down and takes the po- sition shown in Fig. 169, C. When a bee en- ters such a flower the pollen is transferred di- rectly to the stigma. There are numerous other devices for loading the insect with pollen, in- cluding the pumping mechanism of the Pea flower, the irritable stamens of Barberry, Prickly Pear, etc., which spring when touched at the base, thereby scat- tering pollen on the insect, and also the curious arrangements found in Orchids. An account of these, together with other matters concerning pollination, will. 169. Sage flowers cut open: a, a bee entering the flower; &. an anther {an) striking the bee: c, the stigma {st) of an older tiower removing pollen from the 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 Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
Size: 1273px × 1963px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectbotany
