UW Burke Herbarium species comparison

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Erigeron poliospermus

Erigeron glacialis

hairy-seeded daisy, cushion fleabane

glacier fleabane
Habit Taprooted perennial with short-branched, woody base; stems to 15 cm. high; plants more or less spreading-hairy and glandular throughout. Fibrous-rooted perennial from a short rhizome, up to 7 dm. tall, amply leafy.
Leaves

Basal leaves linear-oblanceolate to spatulate, up to 8 cm. long and 12 mm. wide, the cauline leaves reduced.

Basal leaves oblanceolate or broader, the cauline not much reduced, ovate; all leaves usually entire.
Flowers

Heads solitary, hemispheric, the disk 9-20 mm. wide;

involucre 5-9 mm. high;

rays 15-45, pale pink or purple to deep violet, 4-15 mm. long and 1.3-3.6 mm. wide;

pappus of 20-30 capillary bristles.

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(s)

Achenes densely covered with long, silky hairs.

Achene usually 5-nerved.

Erigeron poliospermus

Erigeron glacialis
Flowering time April-June July-September
Habitat Dry, open, typically rocky areas, often with sagebrush. Moist, open areas at mid- to high elevations in the mountains.
Distribution
Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to western Idaho.
[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 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. 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. poliospermus var. cereus, E. poliospermus var. poliospermus
E. glacialis var. glacialis
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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