Dieteria bigelovii

(Bigelow’s Tansy-aster)

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Dieteria bigelovii, Great Sand Dunes National Park, Alamosa Co. 8766

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Dieteria bigelovii, Four Mile Area, Chaffee Co. 9941

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Dieteria bigelovii, Great Sand Dunes National Park, Alamosa Co. 8761

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Dieteria bigelovii, Four Mile Area, Chaffee Co. 9944

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Dieteria bigelovii, Great Sand Dunes National Park, Alamosa Co. 8770

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Dieteria bigelovii, Great Sand Dunes National Park, Alamosa Co. 8756

Scientific Name Dieteria bigelovii (Machaeranthera bigelovii) USDA PLANTS Symbol MABI
Common Name Bigelow's Tansy-aster, Tall Tansy-aster ITIS Taxonomic Serial No. 780287
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine (5000 to 11200 ft.); meadows, forest clearings, roadsides.
Plant: Erect biennial or perennial, normally 2 to 3 feet tall, moderately branched stems.
Leaves: Stem leaves alternate, sessile, and narrowly lanceolate to oblanceolate 0.2 to 0.6 inches wide and up to 7+ inches long with toothed edges.
Inflorescence: Composite flower heads 1 to 2 inches arranged in terminal panicles, 12 to 60 purple rays, yellow disk florets; several rings of long, narrow, curving, green phyllaries underneath covered with glandular hairs and sticky secretions.
Bloom period: June to October.
References: "Flora of Colorado" by Jennifer Ackerfield, SEINet, American Southwest and SW Colorado Wildflowers.
BONAP Distribution Map

Colorado Status:
Native

© Tom Lebsack 2022

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