| 单词 | burweed marsh elder |
| 释义 | burweed marsh elder (extremely rare) n WORD FAMILY burweed marsh elder n tall annual marsh elder common in moist rich soil in central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever Syn|Hyper Iva xanthifolia, false ragweed iva, marsh elder any of various coarse shrubby plants of the genus Iva with small greenish flowers; common in moist areas (as coastal salt marshes) of eastern and central North America |
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