Ambrosia trifida - Wikipedia
Ambrosia trifida, the giant ragweed, is a species of flowering plant in the family Asteraceae. It is native to North America, where it is widespread in Canada, the United States, and northern Mexico. [1]
Ambrosia trifida — giant ragweed - Go Botany
It shares with common ragweed the allergenicity of its wind-dispersed pollen. It was used medicinally by Native American tribes including the Cherokee, Iroquois, Lakota and Meskwaki, and in former times the seeds may have been a food source, as seed caches have been found in ancient settlements.
Ambrosia trifida (Giant Ragweed) - Minnesota Wildflowers
Flower: Slender spike-like racemes, often branched at the base, 3 to 8 inches long, at the tip of the central stem and branches. Male (staminate) flowers are yellow to greenish with no petals, about 1/8 inch across, hanging down on short stalks along the spike.
Giant Ragweed – Ambrosia trifida - Wisconsin Horticulture
This factsheet will help you identify giant ragweed - Ambrosia trifida, a common weed in pastures and other settings.
Giant ragweed | Integrated Crop Management
Giant ragweed Ambrosia trifida L. Family: Asteraceae (Composite family) Life cycle: Annual. Native status: Native to North America. Habitat: Crop fields, flood plains, field edges. General description: Erect plant up to 12 ft tall. Stems and leaves rough, …
Ambrosia trifida Profile – California Invasive Plant Council
Ambrosia trifida (giant ragweed) is an annual herb (family Asteraceae) with a long cluster of green-yellow flowers and opposite leaves found in the central western and southwestern areas of California. Giant ragweed has both female and male flower parts.
Ambrosia trifida Giant Ragweed, Great ragweed, Texan great ...
2006年9月27日 · Ambrosia trifida is a ANNUAL growing to 2 m (6ft 7in) at a medium rate. It is in flower from August to October. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Wind.