Rudbeckia hirta
(Black-eyed Susan)
Rudbeckia hirta, Cordova Pass Rd., FR 415, Huerfano Co. 7031
Rudbeckia hirta, FR 265, Gunnison Co. 2583
Rudbeckia hirta, Along Rist Canyon Rd., Larimer Co. 2050
Rudbeckia hirta, FR 265, Gunnison Co. 3985
Rudbeckia hirta, FR 265, Gunnison Co. 3994
Rudbeckia hirta, FR 265, Gunnison Co. 2599
Rudbeckia hirta, FR 265, Gunnison Co. 2587
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 |
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| 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 2024
Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains