OregonFlora species comparison

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Erigeron flettii

Erigeron compositus
Erigeron flettii

cutleaf daisy, dwarf mountain fleabane, fernleaf fleabane
Habit Plants perennial, 5–20 cm; taprooted with branching caudices.
Stems

erect, glabrous to sparsely hirsute and becoming more so distally, usually densely glandular.
Basal leaves

persistent, spatulate to obovate, 5–60 × 5–20 mm;

margins (1)2–3-ternately lobed or dissected;

surfaces moderately to densely strigose or hispid, usually minutely glandular.
Cauline leaves

5–20 × 1–2 mm, abruptly reduced to linear bracts.
Involucres

2–8 × 6–18 mm.
Ray florets

20–60+, sometimes missing or reduced to tubes, white to pink to purple;

rays 0–8 × 0–1.5 mm.
Disc florets

corollas 3–5 mm.
Phyllaries

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

surfaces sparsely to densely hirsute, usually minutely glandular.
Fruits

2–3 mm, densely strigose;

inner pappi of numerous barbellate bristles.
Heads

1, radiate, sometimes disciform.
2n

=18, 36, 45, 54.

Erigeron flettii

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

Rocky slopes, ridges. Flowering May–Sep. 600–3000 m. BR, BW, Casc, ECas, Owy, Sisk. CA, ID, NV, WA; north to AK, northeast to Greenland, east to SD, southeast to NM; Asia. Native.

Individuals with onceternately lobed leaves have been separated as variety glabratus, but there does not seem to be any geographic pattern to this classification. Polyploids are known within this species and reduction of rays is associated with increases in ploidy.
Source Flora of Oregon, volume 2, page 254
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. 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 compositus var. compositus, Erigeron compositus var. glabratus
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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