The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links
Erigeron oreganus

Gorge daisy, gorge fleabane, Oregon fleabane

golden fleabane

Habit Plants perennial, 5–15 cm; taprooted, caudices unbranched. Plants perennial, 5–10 cm; fibrous-rooted, with short, usually unbranched caudices.
Stems

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

erect; hirsute to villous, minutely glandular.

Basal leaves

persistent, obovate, 15–90 × 5–20 mm;

margins coarsely serrate to shallowly lobulate;

surfaces sparsely to moderately hirsute to strigose.

persistent, spatulate to oblanceolate, 10–50 × 5–10 mm;

margins entire;

surfaces moderately to densely strigose, eglandular to minutely glandular.

Cauline leaves

obovate to elliptic; little or not reduced distally;

surfaces sparsely to moderately hirsute.

5–10 × 1–5 mm abruptly reduced, often a single linear bract.

Involucres

4–7 × 9–15 mm.

4–6 × 10–15 mm.

Ray florets

30–60, pink to purple;

rays 4–5 × 0.5–1 mm.

40–60, bright yellow;

rays 4–6 × 0.5–1.5 mm.

Disc florets

corollas 3–5 mm.

corollas 3–4 mm.

Phyllaries

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

surfaces remotely hirsute, strongly stipitate-glandular.

in 2–3 series, often purplish colored;

surfaces moderately to densely woolly-villous, sparsely glandular.

Fruits

2–3 mm, moderately strigose;

inner pappi of several unbarbed to weakly barbellate twisted bristles.

2–3 mm, moderately strigose;

inner pappi of numerous barbellate bristles.

Heads

1–4, radiate.

1, radiate.

2n

=18.

Erigeron oreganus

Erigeron aureus

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

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.

Ridges, talus, rocky slopes. Flowering Jul–Aug. 1600–2600 m. BW. WA; north to British Columbia, northeast to Alberta. Native.

In Oregon, this native species is currently known only from a single collection in the Eagle Cap Wilderness, Wallowa Mountains.

Source Flora of Oregon, volume 2, page 259
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 252
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. 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. 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
Web links