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Ambrosia ×helenae
Scientific Name: Ambrosia ×helenae
Family: Asteraceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Ambrosia × helenae – Helen's Ragweed
Ambrosia × helenae, commonly known as Helen's ragweed, is a hybrid species within the genus Ambrosia.
Taxonomy and Nomenclature
- Scientific Name: Ambrosia × helenae Rouleau
- Common Names: Helen's ragweed, ragweed
- Family: Asteraceae (Sunflower family)
- Kingdom: Plantae (Plants)
- Subkingdom: Tracheobionta (Vascular plants)
- Division: Magnoliophyta (Flowering plants)
- Class: Magnoliopsida (Dicotyledons)
- Subclass: Asteridae
- Rank: Hybrid
- Synonyms: None explicitly mentioned, but the text refers to it as a hybrid between A. artemisiifolia and A. trifida.
- TSN: 36509
Distribution and Habitat
While specific habitat details are missing from the provided text, the species is found in Tompkins County, NY.
Morphological Characteristics
- Growth Habit: Described as a Forb/Herb.
Genetic Information
- Ambrosia bidentata, a related species, has a chromosome number of 2n = 34. Ambrosia artemisiifolia, another relative, has a chromosome number of 2n = (28), (34), 36.
Ecology
The text mentions ragweed allergy.
Further Information
- Discover Life: Discover Life provides information on the biology, natural history, ecology, identification, and distribution of Ambrosia × helenae.
- NatureServe
- BONAP (Biota of North America Program) North American Plant Atlas: BONAP North American Plant Atlas
- Wikimedia Commons provides images and distribution maps.
- Encyclopedia of Life
- ITIS (Integrated Taxonomic Information System)
- DiversityOfLife.org