Iva annua

（重定向自Marsh elder）

Iva annua, sumpweed or marshelder, is a North American herbaceous annual plant in the sunflower family. It is native to northeastern Mexico (Tamaulipas) and to the central and southern United States, primarily the Great Plains and Mississippi Valley as far north as North Dakota. There are some populations in the eastern US, but these appear to represent introductions.

单词	Marsh elder
释义	Marsh elder 英语百科 Iva annua （重定向自Marsh elder） Iva annua, sumpweed or marshelder, is a North American herbaceous annual plant in the sunflower family. It is native to northeastern Mexico (Tamaulipas) and to the central and southern United States, primarily the Great Plains and Mississippi Valley as far north as North Dakota. There are some populations in the eastern US, but these appear to represent introductions.
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