Parthenium species

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Scientific Name Parthenium confertum USDA PLANTS Symbol
PACO11
Common Name Lyreleaf Parthenium, Gray's Feverfew ITIS Taxonomic Serial No.
38163
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Sandy soils, open areas.
Plant: Biennial 4 to 12 inches tall.
Leaves: Leave shape ovate overall, 1-1/2 to 3 inches long, pinnately-lobed, with erect hairs and dotted with glands .
Inflorescence: Terminal cluster of composite white flower heads, each 3/16-inch across, with 5 ray florets surrounding 20 to 30 or more disk florets.
References: Descr. adapted from SEINet.
Texas Status
Native
Scientific Name Parthenium hysterophorus USDA PLANTS Symbol
PAHY
Common Name False Ragweed, Santa Maria Feverfew ITIS Taxonomic Serial No.
38164
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Various soils and habitats; widespread.
Plant: Erect stout annual or biennial 12 to 40 inches tall, stem grooved and branching in upper portion.
Leaves: Deeply-lobed leaves,pinnately-dissected, 4 to 8 inches long overall.
Inflorescence: Terminal cluster of composite white flower heads, each 3/16-inch across, with 5 ray florets surrounding many disk florets.
References: Descr. excerpt from "Wildflowers of Texas" by Geyata Ajilvsgi.
Texas Status
Introduced

© Tom Lebsack 2017