UW Burke Herbarium species comparison

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Erigeron filifolius

Erigeron bloomeri

Peck's threadleaf fleabane

Bloomer's fleabane, scabland fleabane
Habit Perennial from a taproot and branched, short woody base, 1-5 dm. tall, the stem densely covered with fine, appressed hairs aligned in one direction. Perennial with a tap-root and branched, short woody base, 5-15 cm. tall, the herbage with fine, white hairs aligned in one direction.
Leaves

Leaves both basal and cauline, linear or linear-filiform, 1-8 cm. long and 0.3-3 mm. wide, of uniform width.

Leaves all in a basal cluster, linear, 2-7 cm. long and 0.7-2 mm. wide.
Flowers

Heads solitary or several;

involucre 4-6 mm. high, with fine, soft hairs or small glands or both;

rays 15-125, blue, pink or white, 3-13 mm. long and 1-2 mm. wide;

pappus of 20-30 simple hairs.

Heads solitary on long peduncles;

involucre 5-10 mm. high, with soft hairs; ray and pistillate flowers absent; disk corollas 4.5-7 mm. long, yellow;

pappus bristles 25-40, unequal.
Fruits

Achenes glabrous below, short-hairy above.

Erigeron filifolius

Erigeron bloomeri
Flowering time May-July June-August
Habitat Sagebrush plains, dry slopes, and grasslands. Dry, open, rocky areas at low to moderate elevations
Distribution
Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east to Montana, Idaho, and Utah.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in central and southeastern Washington; central Washington to California, east to Idaho and Nevada.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Not of concern Not of concern
Sibling taxa
E. acris, E. aliceae, E. annuus, E. aureus, E. basalticus, E. bloomeri, E. caespitosus, E. chrysopsidis, E. compositus, E. corymbosus, E. davisii, E. disparipilus, E. divergens, E. eatonii, E. elatus, E. flettii, E. glacialis, E. howellii, E. inornatus, E. karvinskianus, E. leibergii, E. linearis, E. lonchophyllus, E. nivalis, E. oreganus, E. peregrinus, E. philadelphicus, E. piperianus, E. poliospermus, E. pumilus, E. salishii, E. speciosus, E. strigosus, E. subtrinervis
E. acris, E. aliceae, E. annuus, E. aureus, E. basalticus, E. caespitosus, E. chrysopsidis, E. compositus, E. corymbosus, E. davisii, E. disparipilus, E. divergens, E. eatonii, E. elatus, E. filifolius, E. flettii, E. glacialis, E. howellii, E. inornatus, E. karvinskianus, E. leibergii, E. linearis, E. lonchophyllus, E. nivalis, E. oreganus, E. peregrinus, E. philadelphicus, E. piperianus, E. poliospermus, E. pumilus, E. salishii, E. speciosus, E. strigosus, E. subtrinervis
Subordinate taxa
E. bloomeri var. bloomeri
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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