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Erigeron oreganus

Gorge daisy, gorge fleabane, Oregon fleabane

Klamath fleabane

Habit Plants perennial, 5–15 cm; taprooted, caudices unbranched. Plants perennial, 5–25 cm; taprooted, caudices branching.
Stems

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

erect to decumbent-ascending; hirsute, eglandular;

hairs usually spreading and slightly reflexed.

Basal leaves

persistent, obovate, 15–90 × 5–20 mm;

margins coarsely serrate to shallowly lobulate;

surfaces sparsely to moderately hirsute to strigose.

withering by flowering.

Cauline leaves

obovate to elliptic; little or not reduced distally;

surfaces sparsely to moderately hirsute.

oblong to narrowly oblanceolate, 10–30 × 1–4 mm, slightly reduced distally or not;

margins entire;

surfaces moderately to densely hirsute, eglandular.

Involucres

4–7 × 9–15 mm.

4–6 × 8–14 mm.

Ray florets

30–60, pink to purple;

rays 4–5 × 0.5–1 mm.

20–40, lavender to purple;

rays 4–6 × 0.7–2 mm.

Disc florets

corollas 3–5 mm.

corollas 3.5–5 mm.

Phyllaries

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

surfaces remotely hirsute, strongly stipitate-glandular.

in 2–3 unequal series;

surfaces glabrous to very sparsely hirsute, densely minutely glandular.

Fruits

2–3 mm, moderately strigose;

inner pappi of several unbarbed to weakly barbellate twisted bristles.

2–3 mm, sparsely to densely strigose;

inner pappi of numerous barbellate bristles.

Heads

1–4, radiate.

1–4 in loose corymb-like arrays, radiate.

Erigeron oreganus

Erigeron klamathensis

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.

Rocky areas, ridges, crevices. Flowering Jun–Sep. 500–1500 m. Sisk. CA. Native.

Source Flora of Oregon, volume 2, page 259
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 258
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. 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
Synonyms Erigeron breweri, Erigeron breweri var. klamathensis
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