Ambrosia psilostachya [Asteraceae]

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Scientific Name Ambrosia psilostachya USDA PLANTS Symbol AMPS
Common Name Cuman Ragweed, Perennial Ragweed ITIS Taxonomic Serial No. 36516
Family Asteraceae (Sunflower) SEINet
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Description Habitat: Roadsides, disturbed areas. Widespread and abundant in much of Texas and elsewhere.
Plant: Erect perennial 4 to 24 inches tall, sometimes taller; branching, hairy stem.
Leaves: Hairy, up to 4 inches long, variable shape from lanceolate to nearly oval, divided into many narrow, pointed lobes.
Inflorescence: Composite flowers arranged in spikes atop the stems, and composed of many downward-pointing staminate (male) flower heads, yellow; pistillate (female) heads located below and in the axils of leaves.
Bloom Period: Late summer and fall.
References: SEINet and Wikipedia.
BONAP Distribution Map

Texas Status:

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© Tom Lebsack 2023