UW Burke Herbarium species comparison

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Erigeron oreganus

Erigeron glacialis
Erigeron oreganus

Gorge fleabane, Oregon fleabane

glacier fleabane
Habit Perennial from a stout, woody base and root, the lax stem 5-15 cm. long, covered with glands and loose, sticky hairs. Fibrous-rooted perennial from a short rhizome, up to 7 dm. tall, amply leafy.
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.

Basal leaves oblanceolate or broader, the cauline not much reduced, ovate; all leaves usually entire.
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 or few, the disk 10-25 mm. wide;

involucre 7-11 mm. high, the bracts linear, pointed, about equal in length, loose and rather herbaceous, about 1 mm. wide;

rays 30-80, 8-25 mm. long and 2-4 mm. wide, dark to pale purple;

disk flowers 4-6 mm. long;

pappus of 20-30 capillary bristles.
Fruit

Achene usually 5-nerved.

Erigeron oreganus

Erigeron glacialis
Flowering time May-September July-September
Habitat Moist shady cliffs and ledges. Moist, open areas at mid- to high elevations in the mountains.
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]
Widely distributed in the mountains throughout Washington; Alaska to California, east to the Rocky Mountains.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Threatened in Washington (WANHP) 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. 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. 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
Subordinate taxa
E. glacialis var. glacialis
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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