Dieteria canescens
(Hoary Tansy-aster)
Dieteria canescens, Dinosaur National Monument, Moffat Co. 1476
Dieteria canescens, Green Mountain Reservoir, Summit Co. 8661
Dieteria canescens, Silver Shekel, Breckenridge, Summit Co. 5025
Dieteria canescens, Dinosaur National Monument, Moffat Co. 1486
Dieteria canescens, Silver Shekel, Breckenridge, Summit Co. 5027
Dieteria canescens, Dinosaur National Monument, Moffat Co. 1477
Dieteria canescens, Green Mountain Reservoir, Summit Co. 8667
Dieteria canescens, Silver Shekel, Breckenridge, Summit Co. 5031
| Scientific Name | Dieteria canescens (Machaeranthera canescens) | USDA PLANTS Symbol | MACA2 |
| Common Name | Hoary Tansy-aster | ITIS Taxonomic Serial No. | 512282 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Life zones and habitat: Plains to alpine (4400 to 12000 ft.); open hillsides, roadsides, meadows. Plant: Erect biennial or perennial, 4 tp 20 inches tall; stems branched, covered with fine, gray hairs. Leaves: Stem leaves linear-oblanceolate to spatulate up to 4 inches long with toothed or smooth edges and surfaces smooth or with fine hairs. Inflorescence: Composite flower heads about 1 inch across or less across, arranged in terminal panicles, each with 10 to 25 purple rays and many yellow disk florets; several rings of curving, usually smooth green phyllaries underneath. Bloom period: July to October. References: "Flora of Colorado" by Jennifer Ackerfield, SEINet, American Southwest and SW Colorado Wildflowers. Note: See SW Colorado Wildflowers for an excellent discussion of the differences between D. bigelovii and D. canescens. |
BONAP Distribution Map Map Color Key | Colorado Status: Native |
© Tom Lebsack 2025
Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains
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