Scientific details

SCIENTIFIC NAME: Ambrosia acanthicarpa

 COMMON NAME(S): Flat-spine burr ragweed, false ragweed
SYNONYM(S): Franseria acanthicarpa (Hook,) Coville
FAMILY: ASTERACEAE (COMPOSITAE) - Sunflower Family
ORIGIN: Western United States
HABITAT: River banks and sand pits, waste places
RANGE: Western United States and into Canada
TYPE: Annual herb
HEIGHT: 6-24"
CHARACTERISTICS:
LEAVES: Alternate, simple, but cut into deep lobes, to 4" long; leaves covered with short, stiff hairs
FLOWERS: Tiny, collected into separate heads on the same plant
FLOWERING SEASON: Late summer to fall
FRUITS: Tiny, single-seeded with straight, flat spines

ALLERGENIC COMPONENTS: Pollen, foliage
ALLERGENIC PRINCIPLES: Pollen allergens, oleoresins (lactones)
ALLERGENIC PROPERTIES: Respiratory and dermatitis
COMMENTS:

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