| 单词 | false ragweed |
| 释义 | false ragweed (once / 5909656 pages) n WORD FAMILY false ragweed 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, burweed marsh elder 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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