Giant Ragweed
Synonyms: Great Ragweed
Scientific Name: Ambrosia trifida
Non-showy, wind-pollinated flowers, irritating allergies. Aster family (flower heads composed of multiple florets, often disk flowers or both disk and ray flowers).
Giant Ragweed
Synonyms: Great Ragweed
Scientific Name: Ambrosia trifida
Giant Ragweed
| Genus species: | Ambrosia trifida | |||||||||||
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| Common Names: | Giant Ragweed, Great Ragweed | |||||||||||
| Family Name: | Asteraceae 
Flowers of two basic types: 1) disk florets with tubular corollas, and 2) ray florets with ligulate corollas. Heads are composed of exclusively one type or the other (discoid or ligulate), or typically with disk florets in the center and ray florets around the perimeter; fruit an achene (or cypsela). | |||||||||||
| Seed Type | Angiosperm | |||||||||||
| Origin:
Native: native to North America. Non-native: not native to North America. Introduced Native: native to North America, but not Rowe Woods. * Definitions based on the USDA terminology |
Native | |||||||||||
| Category: | Wildflower | |||||||||||
| Flower Color: | Yellow Green/Brown | |||||||||||
| Identified by: | A. Swanson | |||||||||||
| Months in Bloom The highlighted month(s) in this chart indicates the month(s) the plant has been observed blooming. | ||||||||||||
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