as·cle·pi·as /əˈsklɪpɪəs, æ-/ 名詞
  As·cle·pi·as, n.  Bot. A genus of plants including the milkweed, swallowwort, and some other species having medicinal properties.
  Asclepias butterfly Zool., a large, handsome, red and black butterfly (Danais Archippus), found in both hemispheres. It feeds on plants of the genus Asclepias.
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  Asclepias
       n : genus of chiefly North American perennial herbs: silkweed;
           milkweed [syn: genus Asclepias]