UW Burke Herbarium species comparison

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Erigeron poliospermus

Erigeron bloomeri

hairy-seeded daisy, cushion fleabane

Bloomer's fleabane, scabland fleabane
Habit Taprooted perennial with short-branched, woody base; stems to 15 cm. high; plants more or less spreading-hairy and glandular throughout. Perennial with a tap-root and branched, short woody base, 5-15 cm. tall, the herbage with fine, white hairs aligned in one direction.
Leaves

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

Leaves all in a basal cluster, linear, 2-7 cm. long and 0.7-2 mm. wide.
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 on long peduncles;

involucre 5-10 mm. high, with soft hairs; ray and pistillate flowers absent; disk corollas 4.5-7 mm. long, yellow;

pappus bristles 25-40, unequal.
Fruits

Achenes densely covered with long, silky hairs.

Achenes glabrous below, short-hairy above.

Erigeron poliospermus

Erigeron bloomeri
Flowering time April-June June-August
Habitat Dry, open, typically rocky areas, often with sagebrush. Dry, open, rocky areas at low to moderate elevations
Distribution
Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to western Idaho.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in central and southeastern Washington; central Washington to California, east to Idaho and Nevada.
[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. 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
Subordinate taxa
E. poliospermus var. cereus, E. poliospermus var. poliospermus
E. bloomeri var. bloomeri
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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