Burke: Erigeron filifolius vs. Erigeron aliceae

	Erigeron filifolius	Erigeron aliceae
	Peck's threadleaf fleabane	Alice's fleabane, Eastwood's fleabane
Habit	Perennial from a taproot and branched, short woody base, 1-5 dm. tall, the stem densely covered with fine, appressed hairs aligned in one direction.	Perennial usually from a rhizome, 3-8 dm. tall, amply leafy, covered with stiff, short, blunt hairs.
Leaves	Leaves both basal and cauline, linear or linear-filiform, 1-8 cm. long and 0.3-3 mm. wide, of uniform width.	Leaves entire or coarsely toothed, the lower ones up to 20 cm. long including the petiole, and 3.5 cm. wide, the middle and upper leaves sessile, narrowly lanceolate to oblong.
Flowers	Heads solitary or several; involucre 4-6 mm. high, with fine, soft hairs or small glands or both; rays 15-125, blue, pink or white, 3-13 mm. long and 1-2 mm. wide; pappus of 20-30 simple hairs.	Heads 1-several, the disk 12-20 mm. wide; involucral bracts loose, pointed, sub-equal, with conspicuous stiff, white hairs on the lower half, and glands on the upper portion; rays 45-80, pistillate, 10-15 mm. long and 2-3 mm. wide, white to pink-purple; disk corollas 3-4 mm. long, yellow; pappus simple.
Fruits		Achenes usually 2-nerved.

	Erigeron filifolius	Erigeron aliceae
Flowering time	May-July	June-August
Habitat	Sagebrush plains, dry slopes, and grasslands.	Moist to fairly dry, sandy, open areas at middle elevations in the mountains.
Distribution	Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east to Montana, Idaho, and Utah. [WildflowerSearch map] [BONAP county map]	Occurring west of the Cascades crest in the Olympic Mountains and southward in Washington; Washington to California. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Sensitive in Washington (WANHP)
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. 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. 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
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Erigeron filifolius

Erigeron aliceae

Peck's threadleaf fleabane

Alice's fleabane, Eastwood's fleabane

Habit

Perennial from a taproot and branched, short woody base, 1-5 dm. tall, the stem densely covered with fine, appressed hairs aligned in one direction.

Perennial usually from a rhizome, 3-8 dm. tall, amply leafy, covered with stiff, short, blunt hairs.

Leaves

Leaves both basal and cauline, linear or linear-filiform, 1-8 cm. long and 0.3-3 mm. wide, of uniform width.

Leaves entire or coarsely toothed, the lower ones up to 20 cm. long including the petiole, and 3.5 cm. wide, the middle and upper leaves sessile, narrowly lanceolate to oblong.

Flowers

Heads solitary or several;

involucre 4-6 mm. high, with fine, soft hairs or small glands or both;

rays 15-125, blue, pink or white, 3-13 mm. long and 1-2 mm. wide;

pappus of 20-30 simple hairs.

Heads 1-several, the disk 12-20 mm. wide;

involucral bracts loose, pointed, sub-equal, with conspicuous stiff, white hairs on the lower half, and glands on the upper portion;

rays 45-80, pistillate, 10-15 mm. long and 2-3 mm. wide, white to pink-purple; disk corollas 3-4 mm. long, yellow;

pappus simple.

Fruits

Achenes usually 2-nerved.