Ambrosia psilostachya
(Perennial Ragweed)
Pistillate flowers, Ambrosia psilostachya, Office Trail, Lake Brownwood State Park, Brown Co. 9414
Pistillate flowers, Ambrosia psilostachya, Office Trail, Lake Brownwood State Park, Brown Co. 9392
Pistillate flowers, Ambrosia psilostachya, Office Trail, Lake Brownwood State Park, Brown Co. 9408
Staminate flowers, Ambrosia psilostachya, South Goodwater Trail, Lake Georgetown, Williamson Co. 9760
Staminate flowers, Ambrosia psilostachya, South Goodwater Trail, Lake Georgetown, Williamson Co. 9766
Staminate flowers, Ambrosia psilostachya, South Goodwater Trail, Lake Georgetown, Williamson Co. 9762
Staminate flowers, Ambrosia psilostachya, Office Trail, Lake Brownwood State Park, Brown Co. 9418
Ambrosia psilostachya, Office Trail, Lake Brownwood State Park, Brown Co. 9387
| Scientific Name | Ambrosia psilostachya | USDA PLANTS Symbol | AMPS |
| Common Name | Cuman Ragweed, Perennial Ragweed | ITIS Taxonomic Serial No. | 36516 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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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 Map Color Key |
Texas Status: Native |
Banner photo of Castilleja indivisa and Lupinus ssp. taken along FM 1323 north of Johnson City, Blanco County
© Tom Lebsack 2024