UW Burke Herbarium species comparison

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Erigeron filifolius

Erigeron aureus

Peck's threadleaf fleabane

golden 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 short, branched woody base, 2-15 cm. tall, covered with fine, short 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 petiolate, with elliptical to obovate, broadly rounded blade up to 13 mm. wide;

cauline leaves few and 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, the disks 7-16 mm. wide;

involucre 5-8 mm. high, its bracts loose, equal, herbaceous, often purplish, white-woolly;

rays 25-70, yellow, 6-9 mm. long and 1.4-2.5 mm. wide; disk corollas 3.6-4.9 mm. long, yellow;

pappus of 10-20 capillary bristles.
Fruits

Achene

Erigeron filifolius

Erigeron aureus
Flowering time May-July June-August.
Habitat Sagebrush plains, dry slopes, and grasslands. Exposed rocky areas, cliffs, and ridges in subalpine to alpine areas.
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 on both sides of the Cascades crest in Washington; British Columbia to Washington, east to Alberta.
[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. basalticus, E. bloomeri, 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
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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