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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.
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.
Iva annua L. (Marsh-elder, Pelocote, Rough marsh-elder, Sumpweed, Annual marsh elder, Annual marshelder, Seacoast sumpweed). Family Asteraceae. Genus Iva. World flora
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.
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.
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.
24 kwi 2022 · Iva caudata. INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938) Iva ciliata. COMMON NAME: Sumpweed, Rough Marsh-elder, Annual Marsh-elder. To see larger pictures, click or hover over the thumbnails. USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide pnd_ivan2_006_lvd.
