po·lyg·o·num /pəˈlɪgənəm/
蓼屬
Po·lyg·o·num n. Bot. A genus of plants embracing a large number of species, including bistort, knotweed, smartweed, etc.
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Polygonum
n : diverse genus of herbs or woody subshrubs of north temperate
regions [syn: genus Polygonum]