UW Burke Herbarium species comparison

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Erigeron acris

Erigeron linearis

bitter fleabane

desert yellow daisy, lineleaf fleabane
Habit Biennial or perennial, 0.5-8 dm. tall, often covered with stiff, blunt hairs. Perennial from a stout woody base, 5-30 cm. tall, covered throughout with fine, grey, appressed hairs aligned in one direction.
Leaves

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

Bases of stems and basal leaves hardened and enlarged, straw-colored;

leaves linear, 1.5-9 cm. long and 0.5-3 mm. wide, mostly basal.
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 on each stem, the disk 8-13 mm. wide;

involucre 4-7 mm. high;

rays 15-45, yellow, 4-11 mm. long; disk corollas 3.5-5.3 mm. long, yellow;

pappus of 10-20 bristles and some outer scales.

Erigeron acris

Erigeron linearis
Flowering time June-September May-July
Habitat Meadows, forest openings, and open slopes from middle elevations to the subalpine. Dry, open, often rocky areas at low to middle elevations.
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]
Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Montana, Wyoming, and Utah.
[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. glacialis, E. howellii, E. inornatus, E. karvinskianus, E. leibergii, 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
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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