. Elements of botany. Botany. 174 ELEMENTS OF BOTANY or by Those flowers which have one or more sepals or petals prolonged into spurs, like the nastur- tium and the columbine, are inaccessible to most insects except those which have a tongue or a sucking-tube long. Fig. 130. A Sphinx Moth with a Long Sucking-Tube. enough to reach to the nectary at the bottom of the spur. The large sphinx moth, shown in Fig. 130, which is a com- mon visitor to the flowers of the evening primrose, is an example of an insect especially adapted to reach deep into long tubular flowers. 207. Bird-Pollin
. Elements of botany. Botany. 174 ELEMENTS OF BOTANY or by Those flowers which have one or more sepals or petals prolonged into spurs, like the nastur- tium and the columbine, are inaccessible to most insects except those which have a tongue or a sucking-tube long. Fig. 130. A Sphinx Moth with a Long Sucking-Tube. enough to reach to the nectary at the bottom of the spur. The large sphinx moth, shown in Fig. 130, which is a com- mon visitor to the flowers of the evening primrose, is an example of an insect especially adapted to reach deep into long tubular flowers. 207. Bird-Pollinated Flowers.—Some flowers with very long tubular corollas depend entirely upon birds to carry their jjollen for them. Among garden flowers the gladi- olus, the scarlet salvia, and the trumpet honeysuckle are largely dependent upon humming-birds for their jioUina- tion. The wild balsam or jewel-weed and the trumpet- creeper are also favorite flowers of the hiunming-bird. 208. Prevention of Self-Fertilization. — Dio'cious flowers are of course quite incajiable of self-pollination. Pistillate 1 On protection of pollen, see Kerner and Oliver, Vol. LI, jip. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
Size: 1971px × 1268px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1904
