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showy daisy, showy fleabane

threadleaf fleabane

Habit Plants perennial, 15–75 cm; rhizomatous, fibrous-rooted, caudices branching. Plants perennial, 9–40 cm; taprooted, with branching caudices.
Stems

erect;

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

erect, moderately to densely strigose, eglandular.

Basal leaves

usually withering by flowering, oblanceolate to spatulate.

persistent, linear to filiform, 20–80 × 0.5–2 mm;

margins entire;

tips rounded to acute or acuminate;

surfaces moderately to densely strigose.

Cauline leaves

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

margins entire, usually long-ciliate;

surfaces glabrous, rarely remotely strigose.

gradually reduced distally or not.

Involucres

3–7 × 11–16 mm.

4–6 × 7–11 mm.

Ray florets

40–115+, lavender to purple;

rays 7–11 × 0.7–1.5 mm.

20–40, white to purple;

rays 3–9 × 0.7–1.5 mm.

Disc florets

2–3 mm.

corollas 2–4 mm.

Phyllaries

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

surfaces basally hirsute to villous, occasionally minutely glandular.

in 2–4 series;

surfaces moderately to densely strigose or villous, sometimes nearly glabrous distally, densely minutely glandular.

Fruits

2–3 mm, glabrous to sparsely strigose;

inner pappi of numerous barbellate bristles.

1–3 mm, sparsely strigose;

inner pappi of numerous barbellate bristles.

Heads

1–5+ in corymb-like arrays, radiate.

1–5 in corymb-like arrays, radiate.

2n

=18.

Erigeron speciosus

Erigeron filifolius

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.

Rocky areas, sagebrush, juniper and pine forests. Flowering Apr–Aug. 50–2200 m. BR, BW, Col, ECas, Lava, Owy. CA, ID, NV, WA; north to British Columbia, northeast to MT, southeast to UT. Native.

If subspecific taxa were recognized, Oregon specimens would correspond to the typical variety.

Source Flora of Oregon, volume 2 draft
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 256
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. 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 speciosus var. macranthus, Erigeron speciosus var. speciosus, Erigeron subtrinervis Erigeron filifolius var. filifolius, Erigeron filifolius var. robustior
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