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showy daisy, showy fleabane

Erigeron oreganus

Gorge daisy, gorge fleabane, Oregon fleabane

Habit Plants perennial, 15–75 cm; rhizomatous, fibrous-rooted, caudices branching. Plants perennial, 5–15 cm; taprooted, caudices unbranched.
Stems

erect;

surfaces glabrous to rarely remotely hirsute, sometimes minutely glandular distally.

decumbent to erect; hirsute with unequal hairs, sparsely glandular.

Basal leaves

usually withering by flowering, oblanceolate to spatulate.

persistent, obovate, 15–90 × 5–20 mm;

margins coarsely serrate to shallowly lobulate;

surfaces sparsely to moderately hirsute to strigose.

Cauline leaves

lanceolate, 20–80 × 5–15 mm, gradually reduced distally, bases ± clasping;

margins entire, usually long-ciliate;

surfaces glabrous, rarely remotely strigose.

obovate to elliptic; little or not reduced distally;

surfaces sparsely to moderately hirsute.

Involucres

3–7 × 11–16 mm.

4–7 × 9–15 mm.

Ray florets

40–115+, lavender to purple;

rays 7–11 × 0.7–1.5 mm.

30–60, pink to purple;

rays 4–5 × 0.5–1 mm.

Disc florets

2–3 mm.

corollas 3–5 mm.

Phyllaries

in 2–3+ series, usually with orange stripe;

surfaces basally hirsute to villous, occasionally minutely glandular.

in 2–3 series, pale green with dark green medial stripe;

surfaces remotely hirsute, strongly stipitate-glandular.

Fruits

2–3 mm, glabrous to sparsely strigose;

inner pappi of numerous barbellate bristles.

2–3 mm, moderately strigose;

inner pappi of several unbarbed to weakly barbellate twisted bristles.

Heads

1–5+ in corymb-like arrays, radiate.

1–4, radiate.

Erigeron speciosus

Erigeron oreganus

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Conifer forests, moist slopes, riverbanks, wet meadows. Flowering Jun–Sep. 50–2500 m. BR, BW, CR, WV. ID, NV, WA; north to British Columbia, northeast to Alberta, east to NE, southeast to NM. Native.

Shady cliffs, rocky slopes, crevices. Flowering May–Aug. 100–400 m. Casc. WA. Native.

This uncommon species is found only in the Columbia River Gorge.

Source Flora of Oregon, volume 2 draft
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 259
James Riser, Stephen Meyers
Sibling taxa
E. acris, E. aliceae, E. annuus, E. aphanactis, E. aureus, E. bloomeri, E. cascadensis, E. cervinus, E. chrysopsidis, E. compositus, E. corymbosus, E. coulteri, E. decumbens, E. disparipilus, E. divergens, E. eatonii, E. elegantulus, E. filifolius, E. foliosus, E. glacialis, E. glaucus, E. howellii, E. inornatus, E. karvinskianus, E. klamathensis, E. latus, E. linearis, E. lonchophyllus, E. nivalis, E. oreganus, E. peregrinus, E. petrophilus, E. philadelphicus, E. poliospermus, E. pumilus, E. simplex, E. speciosus, E. stanselliae, E. strigosus, E. tener, E. vagus
E. acris, E. aliceae, E. annuus, E. aphanactis, E. aureus, E. bloomeri, E. cascadensis, E. cervinus, E. chrysopsidis, E. compositus, E. corymbosus, E. coulteri, E. decumbens, E. disparipilus, E. divergens, E. eatonii, E. elegantulus, E. filifolius, E. foliosus, E. glacialis, E. glaucus, E. howellii, E. inornatus, E. karvinskianus, E. klamathensis, E. latus, E. linearis, E. lonchophyllus, E. nivalis, E. peregrinus, E. petrophilus, E. philadelphicus, E. poliospermus, E. pumilus, E. simplex, E. speciosus, E. stanselliae, E. strigosus, E. tener, E. vagus
Synonyms Erigeron speciosus var. macranthus, Erigeron speciosus var. speciosus, Erigeron subtrinervis
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