OregonFlora species comparison

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Erigeron evermannii

Erigeron nivalis

northern daisy
Habit Plants biennial or short-lived perennial, 4–20 cm; fibrous-rooted to weakly taprooted, caudices branched.
Stems

erect, sparsely to moderately hirsute, minutely glandular.
Basal leaves

persistent, oblanceolate to spatulate, 10–100 × 3–15 mm;

margins entire, ciliate;

surfaces glabrous to sparsely strigose.
Cauline leaves

oblanceolate, elliptic, or lanceolate, 5–50 × 1–5 mm, reduced distally;

surfaces glabrous or sparsely strigose.
Involucres

4–7 × 7–13 mm.
Ray florets

in 2 series, outer of 30–70 erect, filiform rays, 0.3–0.5 × 3–6 mm, white to light pink, inner of tubular florets; fewer than outer series.
Disc florets

corollas 4–6 mm.
Phyllaries

in 2–3 series;

surfaces nearly glabrous to sparsely hirsute, occasionally villous basally, densely glandular.
Fruits

1.5–2.5 mm, sparsely to moderately strigose;

inner pappi of numerous barbellate bristles.
Heads

1–10 in corymb-like arrays, radiate.
2n

=18.

Erigeron evermannii

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

Gravelly areas, mossy rocks, lava beds, talus slopes, cliffs. Flowering May–Aug. 1500–2500 m. BW, Casc, ECas. CA, ID, WA; north to AK, northeast to Northwest Territories, east to WY, southeast to NM. Native.
Source Flora of Oregon, volume 2, page 259
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. filifolius, E. foliosus, E. glacialis, E. glaucus, E. howellii, E. inornatus, E. karvinskianus, E. klamathensis, E. latus, E. linearis, E. lonchophyllus, 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 acris var. debilis, Trimorpha acris var. debilis
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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