Parthenium hysterophorus

  • Parthenium hysterophorus_img_0
    Parthenium hysterophorus @ Kiba Park

Basic information

Flower Name
Parthenium hysterophorus
Formal Name
Parthenium hysterophorus
Alias
Parthenium hysterophorus, False Ragweed, Santa Maria feverfew, whitetop weed
Habitat
Mexico
Morph
annual wildflower

Comment

What is Parthenium hysterophorus

Parthenium hysterophorus, false ragweed, whitetop weed, famine weed, Santa-Maria, Santa Maria feverfew, or goma giku (scientific name: Parthenium hysterophorus) is an annual wildflower that is native to Mexico and belongs to the family Asteraceae. They are highly reproductive and have been naturalized in Japan and around the world. Since it is part of the Asteraceae family, its leaves resemble chrysanthemum leaves, and its stems are soft and herbaceous. This plant produces small white flowers from midsummer to autumn, and the pollen, which peaks in September, is a cause of allergies to pollen such as asthma. The whole strain is poisonous.

Common name: Parthenium hysterophorus, Scientific name: Parthenium hysterophorus,aka: false ragweed, whitetop weed, famine weed, Santa-Maria, Santa Maria feverfew, or goma giku, also known as False Ragweed, American Ragweed, whitetop weed, famine weed, Santa-Maria, Santa Maria feverfew, Origin: Mexico, Grass height: 100-200 cm, Leaf shape: lanceolate/phenoidal, Petiole: alternate, Flower diameter: 0.5 cm, Flower color: white, Flowering period: August-September, Crown: 5 petals.

Detailed information

Order
Asterales
Family
Asteraceae
Genus
Parthenium
Species
P. hysterophorus
Flower type
Actinomorphic Flower
Flower array
Head
Petal shape
5petals
Leaf type
Pinnate
Leaf edge
Incised
Flowering place
Plain/fleet
Color
White
Season
AugSep
Height
100 ~ 200 [cm]
Diameter
0.5 ~ 0.5

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