False Ragweed

Common Name(s): False Ragweed Scientific Name: Parthenium hysterophorus Family: Asteraceae Sunflower Family Flower: 3/16" ray and disk flowers with 5 rays. Leaves: 8" deeply divided or lobed. Plant: 12-40"

General Comments:

Grows profusly along Bayou banks.

Manystem False-Dandelion

Common Name(s): Manystem False-Dandelion Scientific Name: Pyrrhopappus multicaulis Family: Asteraceae Sunflower Family Flower: 2" yellow ray flower, 2-3 rows of rays, no disks. Stalk may be branched with multiple flowers. Leaves: 2-6" leaves, mostly basal, upper leaves deeply lobed Plant: 8-20"

General Comments:

Forms large masses. Common throughout eastern Texas.

Redspike Mexican Hat, Mexican Hat

Common Name(s): Redspike Mexican Hat, Mexican Hat Scientific Name: Ratibida columnifera Family: Asteraceae Sunflower Family Flower: Composite flowers with drooping rays. Redspike Mexican Hat has a reddish brown columnar disk and orange/yellow rays unevenly lobed in two lobes. Leaves: Pinnatedly compounded with uneven division. Plant: To 3', highly branched.

General Comments:

The Redspike species is more common in Houston than the Green species. It is also taller and has a larger flower.

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SunflowerFamily (Asteraceae)

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