What is of or pertaining to a natural order (Sterculiaceæ) of polypetalous exogenous plants, mostly tropical. The cacao (Theobroma Cacao) is the most useful plant of the order called?

sterculiaceous — Of or pertaining to a natural order (Sterculiaceæ) of polypetalous exogenous plants, mostly tropical. The cacao (Theobroma Cacao) is the most useful plant of the order. (Webster's 1913.)

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