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Erigeron oreganus

Gorge daisy, gorge fleabane, Oregon fleabane

Stansell's fleabane

Habit Plants perennial, 5–15 cm; taprooted, caudices unbranched. Plants perennial, 7–25 cm; tap-rooted, caudices few-branched.
Stems

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

erect to decumbent, glabrous to sparsely strigose, sometimes minutely glandular.

Basal leaves

persistent, obovate, 15–90 × 5–20 mm;

margins coarsely serrate to shallowly lobulate;

surfaces sparsely to moderately hirsute to strigose.

linear to narrowly oblanceolate, 40–120 × 2–5 mm;

margins entire;

tips rounded to acute or acuminate;

surfaces glabrous to sparsely strigose.

Cauline leaves

obovate to elliptic; little or not reduced distally;

surfaces sparsely to moderately hirsute.

linear to narrowly elliptic, 5–40 × 1–3 mm, gradually or abruptly reduced distally;

surfaces glabrous to loosely strigose.

Involucres

4–7 × 9–15 mm.

5–7 × 5–11 mm.

Ray florets

30–60, pink to purple;

rays 4–5 × 0.5–1 mm.

14–36, white to pinkish;

rays 6–10 × 1–1.5 mm.

Disc florets

corollas 3–5 mm.

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;

surfaces sparsely to densely pilose or strigose, minutely glandular.

Fruits

2–3 mm, moderately strigose;

inner pappi of several unbarbed to weakly barbellate twisted bristles.

3–4 mm, sparsely to densely strigose;

inner pappi of numerous barbellate bristles.

Heads

1–4, radiate.

1–2(4), radiate.

Erigeron oreganus

Erigeron stanselliae

Distribution
[WildflowerSearch map]
[BONAP county 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.

Serpentine areas. Flowering Jun–Jul. 700–900 m. Sisk. Native. Endemic to Oregon.

First described in 2011, this serpentine endemic has thus far only been collected a few times in Curry County. The species is named in honor of noted Oregon botanist, Veva Stansell.

Source Flora of Oregon, volume 2, page 259
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 261
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. strigosus, E. tener, E. vagus
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