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1 dzień temu · Pollen Description. Pollen grains of Iva are oblate-spheroidal to prolate-spheroidal; the amb triangular and 3-4 colporate. The sexine is thick, tectate and covered with short spines. They are of the Dicoria type. The pollen grains are 18-30 microns in diameter, depending on the species.
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.
7 sty 2015 · This datasheet on Iva xanthiifolia covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.
How to Identify Marsh Elder (Iva annua)This is Marshelder or sumpweed, a member of the family Asteraceae that is native to North America.
Iva axillaris Pursh (Poverty sumpweed, Poverty-weed, Deathweed, Devil's-weed, Deer-root, Lesser marshelder, Mouseear povertyweed, Smallflowered marshelder, Deeproot, Small-flowered marsh-elder). Family Asteraceae.
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.
Marsh-Elder Genus Details. Iva are annuals or tall perennials. Eleven species are native to North America. Plants grow 1 to 6.5 feet tall in wet conditions along the Atlantic and Gulf Coastal states and in the western U.S.
