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one-stem fleabane

peregrine fleabane, subalpine fleabane

Habit Plants perennial, 3–15 cm; fibrous-rooted, rhizomatous, caudices branched or not. Plants perennial, 20–50 cm; fibrous-rooted, often rhizomatous, caudices usually simple.
Stems

erect, sparsely to moderately villous, eglandular.

erect, nearly glabrous, or sparsely hirsute proximally to densely strigillose or pilose distally, eglandular.

Basal leaves

persistent, oblanceolate to spatulate, 50–350 × 30–90 mm;

margins entire, sometimes moderately ciliate;

surfaces glabrous to glabrate.

persistent, linear-oblanceolate to broadly oblanceolate, 30–150 × 8–30 mm;

margins entire;

surfaces glabrous, eglandular.

Cauline leaves

obovate to linear, abruptly reduced distally;

surfaces usually hirsute.

lanceolate to oblanceolate, 10–80 × 3–30 cm, reduced distally, bases occasionally clasping;

surfaces glabrous.

Involucres

3–7 × 8–16 mm.

5–8 × 12–15 mm.

Ray florets

30–50+, lavender to purple;

rays 5–10 × 0.6–2.2 mm.

30–60, lavender to purple;

rays 5–9 × 1.5–4 mm.

Disc florets

2–3 mm.

corollas 4–6 mm.

Phyllaries

in 2 series;

margins usually ragged;

surfaces moderately to densely villous.

in 2–3 series, with dark medial area, glabrous, densely glandular.

Fruits

1–2 mm, sparsely strigose;

inner pappi of numerous barbellate bristles.

2–4 mm, sparsely to moderately strigose;

inner pappi of numerous barbellate bristles.

Heads

1, radiate.

1(4), radiate.

Erigeron simplex

Erigeron glacialis var. glacialis

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

Rocky areas, meadows. Flowering Jul–Aug. 2400–3000 m. BW. ID, NV; northeast to MT, east to WY, southeast to CO, NM. Native.

Meadows, streamsides, lakeshores, bogs. Flowering Jun–Sep. 800–3200 m. BR, BW, Casc, CR, ECas. CA, ID, NV, WA; north to AK, northeast to Alberta, east to WY, southeast to NM. Native.

Source Flora of Oregon, volume 2, page 261
James Riser, Stephen Meyers
Flora of Oregon, volume 2 draft
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. glacialis var. glacialis
Synonyms Erigeron grandiflorus Erigeron peregrinus ssp. callianthemus, Erigeron peregrinus var. angustifolius, Erigeron peregrinus var. callianthemus, Erigeron peregrinus var. eucallianthemus, Erigeron peregrinus var. scaposus, Erigeron ursinus
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