. Essentials of biology presented in problems. Biology. FLOWERS AND THEIR WORK 43. A humming bird just about to cross-pollinate a flower. parts of the bee are complex. The parts consist of a pair of very small jaws or mandibles, certain other .structures, maxillm, part of the lower lip called the labial palps, and a long tonguelike structure called the ligida. The uses of the mouth parts may be made out by watching a bee on a well-opened flower. Other Flower Visitors.'— Other insects besides the bee are pollen carriers for flowers. Among the most useful are moths and but- terflies. Both insect
. Essentials of biology presented in problems. Biology. FLOWERS AND THEIR WORK 43. A humming bird just about to cross-pollinate a flower. parts of the bee are complex. The parts consist of a pair of very small jaws or mandibles, certain other .structures, maxillm, part of the lower lip called the labial palps, and a long tonguelike structure called the ligida. The uses of the mouth parts may be made out by watching a bee on a well-opened flower. Other Flower Visitors.'— Other insects besides the bee are pollen carriers for flowers. Among the most useful are moths and but- terflies. Both insects feed only on nectar, which they suclv through a long tube- like proboscis. The heads and bodies of these insects are more or less covered with hairs, and the wings are thatched with hairlike, tiny scales. All these structures are of use to the flower because they collect and carry pollen. Projecting from each side of the head of a butterfly is a fluffy structure, the palp. This collects and carries a large amount of pollen, which is deposited upon the stig- mas of other flowers when the butterfly pushes its head down into the flower tube after nectar. Flies and some other insects are agents in cross-pollination. Humming birds are also active agents in some flowers. Snails are said in rare instances to carry pollen. Man and the domesti- cated animals undoubtedly frequently pollinate flowers by brush- ing past them through the fields. ' If the study of other inserts is taken up in the fall in connection with the flower, the student should be referred to parta of Chapters XX and XXI and to the Lab- oratory 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 Hunter, George William, 1873-1948. New York, Cincinnati [etc. ] American Book Company
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