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annual fleabane, eastern daisy fleabane

Habit Plants annual, 40–110 cm; fibrous-rooted or weakly taprooted.
Stems

erect, sparsely to moderately hirsute, usually becoming strigose distally, eglandular.

Basal leaves

usually withering by flowering, broadly lanceolate to oblanceolate, 50–120 × 5–25 mm;

margins coarsely serrate or nearly entire;

surfaces sparsely strigose.

Cauline leaves

lanceolate, oblanceolate, or oblong, 15–80 × 2–15+ mm, often reduced distally;

margins entire to coarsely serrate;

surfaces sparsely strigose.

Involucres

3–5 × 5–13 mm.

Ray florets

60–110, white to pale lavender;

rays 2–8 × 0.5–1 mm.

Disc florets

corollas 2–3 mm.

Phyllaries

in 2–3 series, usually with dark medial area, with or without an orangish stripe;

surfaces glabrous to sparsely villous, often minutely glandular.

Fruits

1–2 mm, sparsely strigose;

disc fruit pappi of numerous barbellate bristles; ray fruit pappi lacking.

Heads

5–many in corymb-like or panicle-like arrays, radiate.

2n

=27.

Erigeron eximius

Erigeron annuus

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

Roadsides, fields, disturbed areas. Flowering Jul–Sep. 0–1000 m. BW, Casc, CR, Est, Lava, WV. CA, ID, WA; scattered in western North America, throughout eastern and mid­western North America; Asia, Europe. Exotic.

Source Flora of Oregon, volume 2, page 252
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. 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
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