Helianthus argophyllus
(Silver-leaf Sunflower)
Helianthus argophyllus, Lamar, Aransas Co. 8845
Helianthus argophyllus, Lamar, Aransas Co. 8863
Helianthus argophyllus, Goose Island State Park, Aransas Co. 9001
Helianthus argophyllus, Goose Island State Park, Aransas Co. 9009
Helianthus argophyllus, Goose Island State Park, Aransas Co. 9003
Helianthus argophyllus, Goose Island State Park, Aransas Co. 9005
Helianthus argophyllus, Lamar, Aransas Co. 8916
| Scientific Name | Helianthus argophyllus | USDA PLANTS Symbol | HEAR3 |
| Common Name | Silver-leaf Sunflower | ITIS Taxonomic Serial No. | 502920 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description | Habitat: Deep, sandy soils in open areas in fields, grasslands, prairies and shrublands Plant: Erect annual, 4 to nearly 10 feet tall, much-branched, especially in upper portions; stems covered with white, woolly hairs. Leaves: Hairy, mostly alternate, ovate leaves 6 to 10 inches long and 4 to 8 inches wide on petioles 3/4 to 4 inches long; bases are more or less cordate; edges are usually entire, rarely serrulate; surfaces covered with dense, woolly hairs adding to their silvery appearance. Inflorescence: Bright yellow composite flower heads up to 3-1/2+ inches across with 15 to 20 rays surrounding 150+ brown central disk florets; involucre with 20-35 ovate to lanceolate-ovate phyllaries, up to 0.7 inches long and 0.3 inches wide, surfaces usually densely hairy and gland-dotted. Bloom Period: Late summer and fall. References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Michael Eason and Flora of North America. |
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