|Scientific Name||Dieteria canescens (Machaeranthera canescens)||USDA PLANTS Symbol||MACA2|
|Common Name||Hoary Tansy-aster||ITIS Taxonomic Serial No.||512282|
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
© Tom Lebsack 2022
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County