Iva annua

Summary 2

Iva annua, the annual marsh elder or sumpweed, 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.

Sources and Credits

  1. (c) Laura Clark, some rights reserved (CC BY-NC),
  2. (c) Wikipedia, some rights reserved (CC BY-SA),

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