UW Burke Herbarium species comparison

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Erigeron poliospermus

Erigeron leibergii

hairy-seeded daisy, cushion fleabane

Leiberg's fleabane
Habit Taprooted perennial with short-branched, woody base; stems to 15 cm. high; plants more or less spreading-hairy and glandular throughout. Perennial from a stout, branched, woody base, 7-25 cm. tall, herbage with soft, curled hairs and stalked glands.
Leaves

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

Basal leaves broadly oblanceolate to elliptic, entire or with fine teeth, up to 12 cm. long and 2 cm. wide;

cauline leaves several, fairly well developed, oblanceolate to elliptic.
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 1-5, the disk 7-14 mm. wide;

involucre 5-8 mm. high, the bracts sub-equal, thin, green, loose;

rays 20-45, pistillate, blue or pink, rarely white, 5-12 mm. long and 1.3-2 mm. wide; disk corollas 3-4.3 mm. long, yellow;

pappus of 12-16 capillary bristles.
Fruits

Achenes densely covered with long, silky hairs.

Erigeron poliospermus

Erigeron leibergii
Flowering time April-June June-August
Habitat Dry, open, typically rocky areas, often with sagebrush. Cliffs and rocky places at moderate 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]
Occurring east of the Cascades crest in In the Wenatchee Mountains of Okanogan, Chelan and Kittitas counties; British Columbia to Washington.
[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. glacialis, E. howellii, E. inornatus, E. karvinskianus, 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
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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