Native Plants
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Ambrosia ×helenae
Ambrosia ×helenae Rouleau
Ragweed, Helen Ragweed
Asteraceae (Aster Family)
Synonym(s):
USDA Symbol: AMHE3
USDA Native Status: L48 (N), CAN (N)
Natural hybrid between Ambrosia artemisiifolia and Ambrosia trifida.
From the Image Gallery
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Plant Characteristics
Duration: PerennialHabit: Herb
Size Notes: Up to about 5 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: White , Yellow , GreenBloom Time: Jul , Aug , Sep , Oct , Nov
Bloom Notes: Flowers are inconspicuous and without ray florets.
Distribution
USA: AR , CT , IA , IL , MI , NY , OHCanada: ON , QC
Web Reference
Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Ambrosia ×helenae in USDA PlantsFNA: Find Ambrosia ×helenae in the Flora of North America (if available)
Google: Search Google for Ambrosia ×helenae
Metadata
Record Modified: 2018-12-11Research By: CBR