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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.
Rough marshelder (Iva annua) is a coarse-textured plant (1) that usually attains a height of around 1-4 feet (2). This plant typically possesses a single stem and a flowering spike with heads holding pistillate and staminate flowers.
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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.
Facts. 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.
Common Name: Sumpweed. 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.
12 sie 2019 · Marsh elder’s range extends from Nova Scotia down along the Atlantic coast and along the Gulf coast states to Texas. It is a branched woody shrub growing up to 12 feet tall, but is more often found in the 4 to 6 foot range. Its somewhat fleshy leaves are lance-shaped with toothed edges.
