UW Burke Herbarium species comparison

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Erigeron filifolius

Erigeron basalticus

Peck's threadleaf fleabane

basalt 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. Several stems from a perennial taproot, sprawling, branched and leafy, especially near the tip.
Leaves

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

Leaves with stiff, blunt hairs and fine glands, wedge-shaped to obovate, up to 4 cm. long and 1.5 cm. wide, deeply tri-lobed, the lobes broad.
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 terminating the branches, the disk 8-12 mm. wide;

involucre 5-6 mm. high, densely glandular;

rays 25-30, light pink or pinkish-purple, 5-7 mm. long and 1.5 mm. wide; disk corollas 3-4 mm. long, pale yellow;

pappus of 10-15 capillary bristles.

Erigeron filifolius

Erigeron basalticus
Flowering time May-July May-July
Habitat Sagebrush plains, dry slopes, and grasslands. Cliff crevices in rocky canyons.
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 where endemic to Kittitas and Yakima counties in Washington.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Not of concern Threatened in Washington (WANHP)
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. 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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