Erigeron evermannii

Rydberg

Fl. Rocky Mts., 903, 1067. 1917.

Common names: Evermann’s fleabane
Endemic
Treatment appears in FNA Volume 20. Treatment on page 305. Mentioned on page 271, 272.

Perennials, 2–10 cm; taprooted, caudices multicipital or branches relatively long and thick to relatively slender, lignescent. Stems erect to ascending, glabrous or sparsely strigose, sometimes sparsely villosulous distally, eglandular. Leaves basal, sometimes few cauline; blades oblanceolate to spatulate (usually folding), 10–40 × 2–7 mm, cauline bractlike or 0, margins entire, faces glabrous or glabrate, eglandular. Heads 1. Involucres 5–8 × 7–13 mm. Phyllaries in 2–3 series (commonly purplish), sparsely to moderately hirsuto-villous, sometimes sparsely minutely glandular. Ray-florets 15–40; corollas white, 6–10 mm, laminae not coiling or reflexing, straight. Disc corollas 3.6–4.5 mm. Cypselae 3.2–3.5 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 25–35 (stramineous, dull) bristles.


Phenology: Flowering Jul–Aug.
Habitat: Alpine slopes, ridges, outcrops, talus, gravelly slopes, often with whitebark pine
Elevation: 2400–3500 m

Discussion

Erigeron evermannii is superficially similar to E. leiomerus and is sometimes misidentified as such; the latter has wider, more numerous, and merely glandular phyllaries, reflexing rays, non-folding leaves, and leafier stems.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron evermannii"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +, corymbiform +  and loose +
indeterminate +  and determinate +
Guy L. Nesom +
Rydberg +
decurrent +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
oblanceolate;spatulate +
2mm;7mm +
rugulose +  and muricate +
slender +
lignescent +
Evermann’s fleabane +
not 2-lipped +  and actinomorphic +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
fertile +  and bisexual +
Idaho +  and Mont. +
2400–3500 m +
strigose +, glabrate +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Alpine slopes, ridges, outcrops, talus, gravelly slopes, often with whitebark pine +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
turbinate;hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
not coiling +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Jul–Aug. +
3-nerved +  and 1-nerved +
hirsuto-villous +
narrowly elliptic +  and linear-lanceolate +
Fl. Rocky Mts., +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
prostrate +  and decumbent +
erect +  and ascending +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron evermannii +
Erigeron +
species +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
tree +, shrub +  and subshrub +