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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.
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.
The shaded areas on the map indicates where the genus has been observed in the United States. Click the map to see a full scale version of these allergy areas.
Marshelder is a native, warm-season annual that is also commonly named Narrowleaf Sumpweed. A member of the Sunflower family, it is characterized by its leaf-like bracts in the flowering stem. Marshelder is very drought tolerant. It can reach 1 to 4.5 ft or 0.3 to 1.4 m tall.
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.
Sulfaweed is a native, warm-season annual in the Sunflower family. It is also called Broadleaf Sumpweed, Broadleaf Marshelder, Seacoast Sumpweed, and Pelocote. The plant can grow from 2 to 6 feet or 0.6 to 1.8 meters tall. It has enough hair to be rough to the touch.
Hayes Iva, also known as San Diego marsh elder, is an evergreen shrub with a naturally sprawling habit with branches extending to 2 – 3 ft. tall and plants reaching 4 – 5 ft. wide. It is characterized by pale green leaves and spikes covered with tiny yellow flowers during spring.
