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Explore our comprehensive guide on True (Rough) Marsh Elder pollen, including allergen details, locations across the US, and botanical insights for healthcare providers and patients managing pollen allergies.
Other Names: Annual Marsh-elder, Rough Marsh-elder. Species Name: Iva annua. Plant Type: Forb. Family Name: Asteraceae, Sunflower Family. Columns of green flowers rise from where leaves attach to stem. Rough texture on stems and leaves; teardrop-shaped leaves with jagged edges. Plant Facts.
Another species, rough marshelder (I. ciliata) is similar in height, but has longer flowering structures with a rough appearance. Dune and coastal marshelders are native to coastal areas in the east and southeast US.
1 dzień temu · Another species, rough marshelder (I. ciliata) is similar in height, but has longer flowering structures with a rough appearance. Dune and coastal marshelders are native to coastal areas in the east and southeast US.
Rough marshelder (Iva annua) is a coarse-textured plant that grows to a height of around 1-4 feet. This plant is abundantly found in lakes, river bottoms, valleys, lowlands, and damp areas. This weed pollen is predominantly found in the US and extends to Mexico.
Iva annua, the annual marsh elder[3] or sumpweed, is a North American herbaceous annual plant in the family Asteraceae that was historically cultivated by Native Americans for its edible seed.
Not reaching farther north than Pennsylvania in its native range, rough marsh-elder is non-native in New England, but a common annual elsewhere in North America. Like ragweed, it is a source of allergenic airborne pollen.
