UW Burke Herbarium species comparison

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Erigeron filifolius

Erigeron strigosus

Peck's threadleaf fleabane

branched fleabane, daisy 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. Mostly annual, 3-7 dm. tall, with scanty foliage.
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 cauline, entire, linear to lanceolate.
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 several to numerous, small;

involucre 2.5-5 mm. high, hairy and somewhat glandular;

rays 50-100, pistillate, white, up to 6 mm. long and 0.4-1 mm. wide; disk corollas 1.5-2.6 mm. long, yellow;

pappus of 10-15 very fragile bristles and some short, slender scales, the bristles wanting in the ray flowers.

Erigeron filifolius

Erigeron strigosus
Flowering time May-July May-October
Habitat Sagebrush plains, dry slopes, and grasslands. Roadsides, fields, thickets, forest edge, and other open, disturbed areas from 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 on both sides of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east to the Atlantic Coast.
[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. 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. subtrinervis
Subordinate taxa
E. strigosus var. septentrionalis, E. strigosus var. strigosus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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