n. pl.1.(Bot.) A Linnæan class of plants having four stamens disposed in pairs of unequal length.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Mesosphaerum odoratum (Benth.) Kuntze; MA 754920 fl: <<Peru / Didynamia / Ex Huanuco (tachado) / Llama-/ panaquin in Peruvia [V a IX-1790] / Nee dedit>> [et.
Bot.: 29 (1804); Sphacele chamaedryoides (Balb.) Briq.; Sphacele campanulata Benth.; MA 255006-1 (2 pliegos), fl, fr: [CHILE] <<La didynamia / Romero vulgo / frutex habitat chile / flores obri / Horminium?>> [et.