. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. pelo ual flowers. Example of certainly cooperate. not infrequent, and its cause is unknown. "Four-leaved" clovers offer well-known ex- amples, and the normal num- ber of leaflets is often in- creased to six or even more. Fig. 2484 illustrates leaf- branching
. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. pelo ual flowers. Example of certainly cooperate. not infrequent, and its cause is unknown. "Four-leaved" clovers offer well-known ex- amples, and the normal num- ber of leaflets is often in- creased to six or even more. Fig. 2484 illustrates leaf- branching in the dahlia. Branching in the plane of flattening, both in foliage leaves and petals, has also been observed, and the branch described as an "out- ; 6. Peloria. When usually , irregular flowers, such as ' those with some spurred or saccate petals or sepals, de- velop all the parts of each set alike, thus becoming radiajly symmetrical, the phenomenon is called pe- loria. It was first observed by Linnaeus in Linaria vul- garis. , and the term peloria, derived from the Greek word for monster, was given by him. Flowers often become peloric on ac- count of changes in their re- lations to light, but other ca reverse change, by which radial flowers become zygo- morphic, occurs in many Compositae when the corollas of disk florets become strap-shaped, as in the cultivated asters and chrysanthemums, but no notice seems to have been taken of it as a malformation. Sometimes, on the contrary, all spurs fail to develop. Figs. 2486-7. in. Transformation of Organs: i. e., alterations more profound than those of form, which result in the production of organs different from those which normally occupy the position; often called metamor- phosis. (The term substitution would be preferable at present, because non-committal as to processes and causes.) It is common to speak of progressive and retrogressive metamorphosis, but these terms involve as- sumptions as to the orig
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