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dwarf blue fleabane, volcanic fleabane

Siskiyou daisy, Siskiyou fleabane

Habit Plants perennial, 4–10 cm; taprooted, with branching caudices. Plants perennial, 10–45 cm; fibrous-rooted, rhizomatous, occasionally with branching caudices.
Stems

erect to basally ascending, sparsely to moderately strigose, eglandular.

erect or ascending, glabrous and mostly eglandular.

Basal leaves

persistent, linear to filiform, 20–50 × 0.5–1 mm, white, bases sheathing;

margins entire;

tips round to acute or acuminate;

surfaces sparsely to moderately strigose.

persistent, oblanceolate to obovate, 10–100 × 5–15 mm;

margins entire;

surfaces glabrous, eglandular.

Cauline leaves

abruptly reduced and usually restricted to basal ? of stem, bases sheathing.

oblanceolate to elliptic, 10–50 × 2–10 mm, gradually reduced distally.

Involucres

3–5 × 8–11 mm.

4–6 × 10–13 mm.

Ray florets

15–30, lavender to purple;

rays 3–8 × 0.7–1.3 mm.

20–40;

corollas white to purple;

rays 3–7 × 0.5–1.5 mm.

Disc florets

corollas 2.5–3.5 mm.

corollas 3–5 mm.

Phyllaries

in 3–4 unequal series;

surfaces sparsely strigose, eglandular.

in 2–3 series, usually with dark medial area;

surfaces glabrous, densely glandular.

Fruits

1–2 mm, nearly glabrous to sparsely strigose;

inner pappi of numerous barbellate bristles.

1.5–2 mm, moderately strigose;

inner pappi of numerous barbellate bristles.

Heads

1, radiate.

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

2n

=27.

Erigeron elegantulus

Erigeron cervinus

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

Rocky areas, sagebrush, coniferous forests. Flowering Jun–Aug. 700–2500 m. BR, BW, Casc, Owy. CA. Native.

Streamsides, river bars, wet rocky banks, moist seeps. Flowering May–Aug. 0–1700 m. Sisk. CA. Native.

Source Flora of Oregon, volume 2, page 256
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 253
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. 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. 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 delicatus
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