|Scientific Name||Rudbeckia laciniata var. ampla||USDA PLANTS Symbol||RULAA|
|Common Name||Golden Glow, Green-head Coneflower, Cut-leaf Coneflower||ITIS Taxonomic Serial No.||530173|
Life zones and habitat: Foothills and montane (5000 to 9000 ft.); moist areas, streamsides, meadows, aspen groves, roadsides.
Plant: Erect, rigid perennial often in colonies, 2 to 7 feet tall, branched at base.
Leaves: Large basal and stem leaves, broadly ovate to lanceolate with toothed edges; lower leaves once or twice pinnately-divided into several segments or pinnatifid; upper leaves are undivided; stem leaves are alternate.
Inflorescence: Very large (up to 6-inces across) composite flower heads in branching clusters; 8 to 12 drooping rays; 150 to 300+ yellow or yellow-green disk florets on central, protruding disc; ovoid-shaped involucre with 8 to 15 wide, pointed phyllaries up to 3/4-inch long.
Bloom Period: June to September.
References: "Flora of Colorado" by Jennifer Ackerfield, American Southwest and Flora of North America.
|BONAP Distribution Map
Map Color Key
© Tom Lebsack 2022
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County