Australian Tropical Rainforest Plants - Online edition
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![](../../images/features/fl_petals_fused/char_fl60.jpg)
FL60 fused for more than half their length
![](../../images/features/fl_petals_fused/char_fl61.jpg)
FL61 fused for less than half their length
This refers to the extent of fusion of the petals, where they are partly to completely fused, or of the perianth where the calyx and corolla are not clearly differentiated.
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