UW Burke Herbarium species comparison

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Erigeron pumilus

Erigeron poliospermus

shaggy fleabane

hairy-seeded daisy, cushion fleabane
Habit Perennial from a woody base and taproot, the stem 5-50 cm. tall, the herbage copiously spreading-hairy. Taprooted perennial with short-branched, woody base; stems to 15 cm. high; plants more or less spreading-hairy and glandular throughout.
Leaves

Leaves basal and cauline, oblanceolate to linear-oblanceolate, up to 8 cm. long and 8 mm. wide.

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

Heads several, the disk 7-15 mm. wide;

involucre 4-7 mm. high, the bracts narrow, spreading-hairy;

rays 50-100, 0.7-1.5 mm. wide, usually white, occasionally pale blue or pink; disk corollas 3.5-5 mm. long, slender, yellow but paler below;

pappus of capillary bristles, with an outer row of shorter bristles.

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.
Fruits

Achenes slightly hairy.

Achenes densely covered with long, silky hairs.

Erigeron pumilus

Erigeron poliospermus
Flowering time May-July April-June
Habitat Open places in the foothills, valleys and plains, often among sagebrush. Dry, open, typically rocky areas, often with sagebrush.
Distribution
Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to western Idaho.
[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. poliospermus, 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. 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
Subordinate taxa
E. pumilus var. intermedius, E. pumilus var. pumilus
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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