Pollen Type: Weed
Cross-Reactivity: Other Ragweeds, False Ragweed
HS Allergy Extract: Ragweed, Short or Ragweed Mix
Genus/Species: Ambrosia artemisiifolia
Common Names: Short Ragweed, Common Ragweed, Dwarf Ragweed
Distribution: Found throughout the United States. Short Ragweed is a North American species that has naturalized in Europe, temperate Asia, India, temperate areas of northern and southern Africa, Australia, New Zealand, and Hawaii.
Locations: Short Ragweed is typically found along roadsides, in vacant lots, along streams, and in fallow fields. It is an invasive weed in agriculture fields, forestry reclamation sites and other disturbed areas.
Pollination Method: Wind-pollinated
Pollinating Period: August–October, depending on latitude. It blooms in most of the U.S. in late July-September, peaking in late August early September.
Description: Short Ragweed is a rough textured annual weed, growing to 4’. It spreads by creeping rootstalks (rhizomes) and sometimes by seed. It typically has many branches with finely cleft, fern-like leaves and features numerous flowering heads on the tip of the spike. A single plant can produce up to a billion grains of pollen per season, making it a significant allergen where abundant.