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pappus n. 冠毛 冠毛 pappus n 1: calyx composed of scales or bristles or featherlike hairs in plants of the Compositae such as thistles and dandelions Pappus \Pap"pus\, n. [L., an old man or grandfather; hence, a
substance resembling gray hairs, Gr. ?.] (Bot.) The hairy or feathery appendage of the achenes of thistles, dandelions, and most other plants of the order {Composit[ae]}; also, the scales, awns, or bristles which represent the calyx in other plants of the same order. [1913 Webster]
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