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Erigeron oreganus

Gorge fleabane, Oregon fleabane

Erigeron disparipilus

Snake River fleabane, white cushion fleabane

Habit Perennial from a stout, woody base and root, the lax stem 5-15 cm. long, covered with glands and loose, sticky hairs. Perennial from a tap-root, 3-12 cm. high, the stem covered with very unequal, spreading hairs.
Leaves

Basal leaves tufted, spatulate to obovate, coarsely toothed or incised, up to 9 cm. long and 2.5 cm. wide;

cauline leaves well developed, broadly lanceolate to ovate or elliptic, up to 4 cm. long and 1 cm. wide.

Leaves nearly all in a basal cluster, finely stiff-hairy, linear or linear-oblanceolate, up to 4 cm. long and 2 mm. wide.

Flowers

Heads 1-several in a leafy inflorescence, the disk 9-13 mm. wide;

involucre 5-7 mm. high, the bracts loose, equal, thin and green;

rays 30-60, pink or white to bluish; disk corollas 3.4-4.7 mm. long, yellow;

pappus simple, of 15-20 bristles that are curled and twisted above.

Heads solitary;

involucres 5-7 mm. high, with spreading short hairs and often glandular as well;

rays 30-60, white, pistillate, becoming pinkish, 5-10 mm. long and 1.5-2.3 mm. wide;

disk flowers yellow;

pappus of 15-25 capillary bristles.

Erigeron oreganus

Erigeron disparipilus

Flowering time May-September May-July
Habitat Moist shady cliffs and ledges. Dry, rocky hillsides at low to middle elevations.
Distribution
Occurring in the Columbia River Gorge in Washington; Columbia River Gorge in Washington to adjacent Gorge area in Oregon.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in the Snake River area in southeastern Washington; southeastern Washington to southeastern Oregon, east to southwestern Idaho.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Threatened in Washington (WANHP) Sensitive 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. filifolius, E. flettii, E. glacialis, E. howellii, E. inornatus, E. karvinskianus, E. leibergii, E. linearis, E. lonchophyllus, E. nivalis, 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. 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
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