Abstract

The variations in floral structure of Cuscuta in Taiwan were studied with special reference to C. campestris. The variations of the floral structure were described and illustrated by using light and scanning electron microscopy. The variations including the following: (1) the absence of floral organs; (2) the abnormal fusion of floral organs; (3) petaloid stamens; (4) the lack of distinctive anther lobes; (5) the unusual protrusions on ovaries; and (6) the extrusion of ovule on ovary surfaces. The variations occur in early developmental stages when the primordia of floral organ were initiated. The findings that the abnormal position of the ovule and the lateral fusion of the scale with the filament or the petal in the species of Cuscuta are first time reported here.

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