laciniation

Prolification is another very frequent occurrence in the case of these flowers, while still other forms arise from laciniation of the petals, or from the formation of excrescences from the petals or stamens, in the form of supplementary petal-like lobes.

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

Frequently this irregular diminution in proportion is coexistent with an unusual degree of cleavage or laciniation of the margin, as in _Acer platanoides laciniatum_, _Tilia asplenifolia_, _Alnus imperialis_

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

Fission or lateral subdivision also gives rise to an apparent increase in number; thus, some so-called double flowers, the elements of which appeared to be increased in numbers, owe the appearance merely to the laciniation or subdivision of their petals.

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