helicoid cyme

noun

Botany.

an inflorescence, or cyme, in which each flowering branch gives rise to one lateral branch that is coiled snail-like and then expanded.

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In the helicoid cyme there is also a false axis formed by the basal portion of the separate axes, but the flowers are not placed in a double row, but in a single row, and form a spiral or helix round the false axis.