different between polygonaceae vs polygonaceous

English

Polygonaceae +? -ous

polygonaceous (comparative more polygonaceous, superlative most polygonaceous)

(botany) Of or pertaining to a family of apetalous plants, Polygonaceae, of which the knotweeds of the genus Polygonum are the type, and which includes also the docks of the genus Rumex, the buckwheat, rhubarb, sea grape of the genus Coccoloba, and several other genera.

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