pleiotaxy

Definitions

noun In bot., a multiplication of the number of whorls—that is, the production of additional distinct whorls, as in many so-called double flowers. Pleiotaxy may affect the bracts, calyx, corolla, andrœcium, gynæcium, or perianth as a whole.

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Gynoecium (see pistils) enlargement of, 430 meiophylly of, 399 meiotaxy of, 406 pleiotaxy of, 388 polyphylly of, 363 suppression of, 406

Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Maxwell T. Masters
The distinction between the two modes in which the parts of the flower are increased in number has been pointed out by Engelmann, Moquin, and others, and the two seem to require distinctive epithets; hence the application of the terms polyphylly and pleiotaxy, as here proposed.

Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Maxwell T. Masters
"polyphylly," using the word in the same sense as in ordinary descriptive botany, while "pleiotaxy" may be applied to those cases in which the number of whorls is increased.

Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Maxwell T. Masters
(_Convallaria maialis_) seems also to be particularly subject to an increase in the number of parts of which its perianth consists, the augmentation being due partly to repetition or pleiotaxy, partly to the substitution of petaloid segments for stamens and pistils. [

Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Maxwell T. Masters