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dwarf blue fleabane, volcanic fleabane

slender fleabane

Habit Plants perennial, 4–10 cm; taprooted, with branching caudices. Plants perennial, 3–15 cm; taprooted, caudices branching.
Stems

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

erect, sparsely strigose, sometimes minutely glandular.

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, narrowly oblanceolate-elliptic to spatulate, 5–50 × 1–4 mm;

margins entire;

tips acute;

surfaces densely strigose.

Cauline leaves

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

few, linear, 5–20 × ~1 mm, abruptly reduced distally.

Involucres

3–5 × 8–11 mm.

3–5 × 7–11 mm.

Ray florets

15–30, lavender to purple;

rays 3–8 × 0.7–1.3 mm.

15–24, blue to purple;

rays 3–6 × 0.5–1 mm.

Disc florets

corollas 2.5–3.5 mm.

corollas 2–4 mm.

Phyllaries

in 3–4 unequal series;

surfaces sparsely strigose, eglandular.

medial areas usually purple;

surfaces glabrous to moderately hirsute, densely glandular.

Fruits

1–2 mm, nearly glabrous to sparsely strigose;

inner pappi of numerous barbellate bristles.

1–3 mm, sparsely strigose;

inner pappi of numerous barbellate bristles.

Heads

1, radiate.

1(3), radiate.

2n

=27.

Erigeron elegantulus

Erigeron tener

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.

Rocky areas, talus, slops, crevices. Flowering May–Aug. 1700–2500 m. BR. CA, ID, NV; northeast to MT, east to WY, southeast to AZ. Native.

In Oregon, Erigeron tener is thus far known only from Steens Mountain.

Source Flora of Oregon, volume 2, page 256
James Riser, Stephen Meyers
Flora of Oregon, volume 2, page 262
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. 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. vagus
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