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Term Definition
Biseriate Composed of two whorls or rows; e.g., a perianth with both calyx and corolla or a hair with two rows of cells. Compare with uniseriate.
Biseriate perianth Referring to a perianth with two whorls or rows; i. e. with both calyx and corolla. Compare with uniseriate. Parts of the perianth. Drawing by B. Angell