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Scabland Fleabane, Bloomer's Daisy, Bloomer's Fleabane - Erigeron bloomeri


Family: Asteraceae - Aster family Genus Common Name: Fleabane Native Status: NativeDicot Perennial Herb
Erigeron bloomeri - Scabland Fleabane, Bloomer's Daisy, Bloomer's Fleabane. Although Scabland Fleabane is the most commonly used common name, I prefer another of the plant's common names - Bloomer's Daisy. The Bloomer's Daisy common name probably won't gain much traction in this digital age, where an Internet search for "Bloomer's Daisy" provides more results for childrens flowered underwear than for this interesting plant. There are three varieties of Erigeron bloomeri (some authorities only recognize two); var. bloomeri has the widest distribution and is the only variety found in Idaho, where these photographs were made.

Erigeron itself is a large and widespread genus, with the USDA Plants Database listing 193 species in North America. Each state of the United States, as well as each territory in Canada, has at least one species of Fleabane present. Most of these are native to the continent, as is the species presented here, Erigeron bloomeri. This species is named for California botanist Hiram G. Bloomer (1819-1874) who collected the plant in Nevada.

There are at least three other members of Erigeron which have rayless, yellow blossoms:
  • E. anaphactis - Rayless Shaggy Fleabane - "Shaggy" because it is quite obviously hairy; bristly hairy.
  • E. reductus - California Rayless Fleabane - is another yellow, rayless Fleabane, found only in California, as implied by its common name. It has linear stem leaves; the other yellow rayless fleabanes do not have stem leaves.
  • E. chrysopsidis var austiniae (syn. E. austiniae) - Sagebrush Fleabane - is a variety of a yellow fleabane which will have no rays or perhaps only vestigial rays. The other varieties of that species have ray flowers. While not as hairy as Rayless Shaggy Fleabane, Sagebrush Fleabane is more apparently hairy than Scabland Fleabane.

  • Found in:
    CA, ID, NV, OR, UT, WA

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Erigeron bloomeri

Distribution of Erigeron bloomeri in the United States and Canada:
USDA Plants Distribution Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov, 14 Dec 2017). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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Site: Lucky Peak Area, Boise Foothills, Ada County, ID Date: 2011-June-12Photographer: Gerald C. Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro
This is another of the members of Asteraceae with no ray flowers; its blossom is made up of many tiny yellow disk florets. Blooms June through August
Erigeron bloomeri

Site: Lucky Peak Area, Boise Foothills, Ada County, ID Date: 2011-June-12Photographer: Gerald C Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro
The stem and leaves of Erigeron bloomeri are variably hairy. Var. nudatus, found in Oregon and California, has mostly glabrous leaves short-hairy stem and tip of linear leaf, but var. bloomeri can be densely hairy, but not bristly like some other rayless yellow Erigeron species.
Click on the photo for a larger image
Erigeron bloomeri

Site: Lucky Peak Area, Boise Foothills, Ada County, ID Date: 2011-June-12Photographer: Gerald C Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro
Until you get fairly close to Scabland Fleabane, the plant does not appear to be particularly hairy, especially on the stems, differentiating from other rayless, yellow Fleabanes having no stem leaves. The leaves will probably have a silver sheen due to the hairs on them.
Click on the photo for a larger image
Erigeron bloomeri

Site: Lucky Peak Area, Boise Foothills, Ada County, ID Date: 2011-June-12Photographer: Gerald C Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro
Scabland Fleabane has basal leaves and caudal leaves on the stems that rise above the plant.
Click on the photo for a larger image
Erigeron bloomeri

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2017
Photographs Copyright owned by the named photographer