Dieteria species

Click on the images below to see larger versions. 

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
Click Here
Description Life zones and habitat: Foothills to subalpine; 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: Descr. adapted from "Flora of Colorado" by Jennifer Ackerfield, SEINet, www.americansouthwest.net and www.swcoloradowildflowers.com.
Colorado Status
Native
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
Click Here
Description Life zones and habitat: Plains to alpine; 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: Descr. adapted from "Flora of Colorado" by Jennifer Ackerfield, SEINet, www.americansouthwest.net and www.swcoloradowildflowers.com.
Note: See www.swcoloradowildflowers.com for an excellent discussion of the differences between D. bigelovii and D. canescens.
Colorado Status
Native

© Tom Lebsack 2017