|Scientific Name||Silphium asteriscus var. asteriscus (Silphium asperrimum)||USDA PLANTS Symbol||SIASA3|
|Common Name||Starry Rosinweed||ITIS Taxonomic Serial No.||38388|
|Description||Habitat: Various soil types near waterways, in ditches and pastures, along railroads and roadsides.
Plant: Erect perennial 20 to 48 inches tall, one or a few branches from base.
Leaves: Lanceolate or narrowly elliptic to ovate or broadly ovate, usually tapered to a pointed tip and tapered at the base; 4-3/4 to 10 inches long; lower stem leaves alternate and petiolate, upper leaves either opposite or alternate and sessile; short hairs on surfaces and entire or finely to coarsely toothed margins.
Inflorescence: Solitary or a tight cluster of a few large, bright yellow composite flowers; 3 or more inches across, 8 to 20 rays and 35 or more disk florets; involucre with hairy, wide, elliptic to ovate overlapping bracts, spreading to slightly recurved with sharply pointed tips.
Bloom Period: Summer and fall.
References: "Wildflowers of Texas" by Michael Eason, Flora of North America and Missouri Plants; Silphium asperrimum in "Manual of the Vascular Plants of Texas" by Correll and Johnston.
|BONAP Distribution Map
Map Color Key
Banner photo of Lupinus ssp. by Rick Capozza, Austin TX
© Tom Lebsack 2023