the aid of insects, for it must be remembered that stamens and pistils of the same length are never found in the same flower. By an adjustment of the size of the body of the different insect visitors it works out so that, while all three body sizes frequently visit each flower, only that particular size of insect suited to the carrying of pollen from stamens of one definite length to a style of similar length actually accomplishes the cross-fertilization of that particular flower. And this without interfering with the visit of another different-sized insect which will accomplish the work for its particular set of stamens and pistils. So marvelous is the adjustment of style length and stamen length to each particular body size of the visiting insects, so perfect is the arrangement of the organs in each flower, that each contributes to the fertilization of its neighbors, never to its own, nor does it interfere with the process in other lengthened styles. Cross-fertilization is thus almost always accomplished in the six different combinations possible in this truly remarkable case of adaptation between insects and flowers. From the almost mathematical complications of the cross-fertilization of the loosestrife it seems a far cry indeed to that of the Italian honeysuckle. This often runs wild over fences, but is unlike the more widely known Japanese honeysuckle, in that its stem passes through the different pairs of opposite, bluish-green leaves, which are joined together at the base. The Italian honeysuckle falls back on the more simple seductions of odor and honey for securing its really important insect visitors. It has such a long tube that only certain night-or evening-flying moths or butterflies can reach the honey. There is, even during the day, such a plentiful supply of this that it frequently fills half the tube, but even then it is quite out of reach of bees which never succeed in getting any. Toward evening, particularly on quiet, still evenings, the flower begins to send off in much increased quantity a heavy rich-scented odor almost overpowering in its sweetness. The butterflies and moths of the dusk having a long proboscis, succumb to this really enchanting lure, which, with the large store of honey, insures quantities of eager suitors. The stigma, while ripening simultaneously with the anthers, protrudes beyond them, so that the butterflies touch pollen only _after_ touching the stigma, which of course is impregnated with pollen from an earlier visit of the insect to a different flower. So assiduous are the butterflies, that on a still night there will be not one grain of pollen left on the much-brushed anthers. If the night is cold or windy much pollen remains and cross-fertilization is left to pollen-eating insects such as mother bees or flies. While these can never get the honey they often do accomplish cross-fertilization and, sometimes by misadventure, self-pollination. It