UW Burke Herbarium species comparison

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Erigeron filifolius

Erigeron eatonii

Peck's threadleaf fleabane

Eaton's 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 from a tap-root, 5-30 cm. tall, the stems decumbent and purplish at the base, with appressed hairs.
Leaves

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

Basal leaves tufted, narrow, acute, gradually tapering to the petiole;

cauline leaves several, conspicuously reduced.
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 or up to 7 in an open inflorescence;

involucres 5-7 mm. high;

rays 20-50, pistillate, white, 5-10 mm. long and 1-3 mm. wide; disk corollas 3.5-5 mm. long, yellow;

inner pappus bristles 15-20, outer obscure.

Erigeron filifolius

Erigeron eatonii
Flowering time May-July May-July
Habitat Sagebrush plains, dry slopes, and grasslands. Grasslands, sagebrush, dry slopes, and forest openings at low to middle 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 the Rocky Mountains.
[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. bloomeri, E. caespitosus, E. chrysopsidis, E. compositus, E. corymbosus, E. davisii, E. disparipilus, E. divergens, 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. eatonii var. villosus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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