UW Burke Herbarium species comparison

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Erigeron acris

Erigeron glacialis

bitter fleabane

glacier fleabane
Habit Biennial or perennial, 0.5-8 dm. tall, often covered with stiff, blunt hairs. Fibrous-rooted perennial from a short rhizome, up to 7 dm. tall, amply leafy.
Leaves

Basal leaves oblanceolate or spatulate, the cauline ones ample to strongly reduced, lance-ovate to linear-oblong;

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

Heads usually several on somewhat glandular, curved peduncles;

involucral bracts tapered and pointed;

rays pistillate, numerous, erect, inconspicuous, white, up to 4 mm. long and 0.4 mm. wide; inner pistillate flowers rayless;

pappus surpassing the disk flowers.

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 acris

Erigeron glacialis
Flowering time June-September July-September
Habitat Meadows, forest openings, and open slopes from middle elevations to the subalpine. Moist, open areas at mid- to high elevations in the mountains.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains, Great Lakes region, and northeastern North America; circumboreal.
[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. 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. 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. acris var. kamtschaticus
E. glacialis var. glacialis
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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