Rudbeckia hirta

(Black-eyed Susan)

_DSC1056%20copy

Rudbeckia hirta, FR 265, Gunnison Co. 2583

_DSC1056%20copy

Rudbeckia hirta, FR 265, Gunnison Co. 3985

_DSC1056%20copy

Rudbeckia hirta, FR 265, Gunnison Co. 3994

_DSC1056%20copy

Rudbeckia hirta, FR 265, Gunnison Co. 2599

_DSC1056%20copy

Rudbeckia hirta, FR 265, Gunnison Co. 2587

_DSC1056%20copy

Rudbeckia hirta, FR 265, Gunnison Co. 2596

Scientific Name Rudbeckia hirta USDA PLANTS Symbol RUHI2
Common Name Black-eyed Susan ITIS Taxonomic Serial No. 36765
Family Asteraceae (Sunflower) SEINet
Reference
Click Here
Description Life zones and habitat: Foothills to montane (5200 to 10000 ft.); various, usually in sandy soils of fields, pastures, open areas.
Plant: Erect annual or short-lived perennial, rigid, grooved stems 12 to 40 inches tall covered with long, rough hairs.
Leaves: Petiolate basal leaves 3 to 12 inches long; alternate, petiolate or sessile stem leaves 1-1/4 to 8 inches long; blades lanceolate to elliptic, not lobed, covered with coarse hairs.
Inflorescence: Solitary or loose arrays of 2 to 5 large composite flowers on long peduncles, up head to 3 inches across with 8 to 16 drooping yellow rays with lengthwise grooves; central disk often-flattened and dome-shaped, yellowish green to purplish brown.
Bloom Period: June to September.
References: "Flora of Colorado" by Jennifer Ackerfield, SEINet and American Southwest.
BONAP Distribution Map

Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County