UW Burke Herbarium species comparison

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Erigeron speciosus

Erigeron filifolius

showy daisy, showy fleabane, splendid fleabane

Peck's threadleaf fleabane
Habit Perennial from a short, woody base, 1.5-8 dm. tall, the stems clustered, amply leafy, glabrous below the inflorescence. 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.
Leaves

Leaves glabrous, triple-nerved, entire, the lower oblanceolate or spatulate, petiolate, mostly deciduous, the other becoming sessile but ample.

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

Heads 1-13 in a open inflorescence;

involucre 6-9 mm. high, glandular;

rays 65-150, blue or rarely white, 9-18 mm. long and 1 mm. wide;

pappus 20-30 bristles, a few of the outer ones shorter.

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.
Fruits

Achenes 2-nerved.

Erigeron speciosus

Erigeron filifolius
Flowering time June-August May-July
Habitat Prairies and forest openings from the lowlands to middle elevations in the mountains. Sagebrush plains, dry slopes, and grasslands.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, Nevada, and Arizona, east to the Rocky Mountains and northern Great Plains.
[WildflowerSearch map]
[BONAP county map]
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]
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. 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. 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. 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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