Dieteria canescens

(Hoary Tansy-aster)

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Dieteria canescens, Green Mountain Rervoir, Summit Co. 8661

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Dieteria canescens, Green Mountain Rervoir, Summit Co. 8652

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Dieteria canescens, Green Mountain Rervoir, Summit Co. 8648

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Dieteria canescens, Green Mountain Rervoir, Summit Co. 8667

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

Colorado Status:
Native

© Tom Lebsack 2022

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