Luther Burbank, his methods and discoveries and their practical application; prepared from his original field notes covering more than 100,000 experiments made during forty years devoted to plant improvement . llen-bearing and pollen-receiving parts, surroundedby the conspicuous insect signal that we term thecorolla; and having also a less conspicuous outershield termed a calyx. The calyx is the original shield about theflower bud, and its function is over when theflower opens. The botanist ordinarily speaks of the calyx asa modified leaf. He refers to the petals of thecorolla as being also mo
Luther Burbank, his methods and discoveries and their practical application; prepared from his original field notes covering more than 100,000 experiments made during forty years devoted to plant improvement . llen-bearing and pollen-receiving parts, surroundedby the conspicuous insect signal that we term thecorolla; and having also a less conspicuous outershield termed a calyx. The calyx is the original shield about theflower bud, and its function is over when theflower opens. The botanist ordinarily speaks of the calyx asa modified leaf. He refers to the petals of thecorolla as being also modified leaves or enlargedand beautified modifications of the calyx. Hethinks of the stamens and the pistil as modifiedpetals; and he justifies this estimate by showingthat under cultivation it is often possible to trans-form these essential organs into petals. Thus, for example, are produced such doubleflowers as the cultivated rose and the chrysan-themum. To the human eye, these are thingsof beauty but from the standpoint of planteconomy they must be regarded as travesties offlowers, since they are far less able and oftenwholly incapable of producing seed. But it is perhaps a somewhat more philo- [85]. Pollen-Bearing Grape The members of the grape family, like the strawberry, differ as to the character of their flowers. Some plants bear perfect blossoms, others are staminate with at most a rudimentary ovary. The plant thus occupies an intermediate position between those plants that all bear perfect flowers and those that always bear the stamens and pistils on separate blossoms. The various arrangements suggest the need of cross-fertilization in the economy of plant life. PRACTICAL POLLENATION sophical view of the flower to consider it as amechanism developed about the all-essential cen-tral organ, the pistil. This, the female organ of the plant, consists,in the developed form, of a basal structure, theovary, containing the ovules or embryo seeds, anda more or less protuberant
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