Erigeron humilis

Graham

Edinburgh New Philos. J. 6: 175. 1828.

Common names: Arctic Alpine fleabane petite vergerette
Synonyms: Er igeron unalaschkensis (de Candolle) Vierhapper E. uniflorus var. unalaschkensis (de Candolle) Ostenfeld
Treatment appears in FNA Volume 20. Treatment on page 326. Mentioned on page 266.

Perennials 2–15 (–25) cm; rhizomatous, fibrous-rooted, rhizomes or caudices simple or branched. Stems erect, villoso-hirsute (hair cross-walls dark to blackish purple), minutely glandular (conspicuously so proximal to heads). Leaves mostly basal (persistent) and cauline; blades spatulate to spatulate-oblanceolate, 10–50 (–80) × 2–7 (–11) mm, cauline abruptly reduced distally, margins entire, faces sparsely to moderately villous (hair cross-walls dark reddish or purple), sometimes sparsely minutely glandular. Heads 1. Involucres 6–9 × 10–15 (–20) mm. Phyllaries in (1–) 2 (–3) series (usually dark purple), strigoso-hirsute (hair cross-walls dark reddish to blackish purple), minutely glandular. Ray-florets 50–100 (–150); corollas bluish purple to lavender, rarely whitish, 4–6 mm, laminae erect (filiform, 0.3–1 mm wide), not coiling or reflexing. Disc corollas 2.4–3 mm. Cypselae 2.2–2.5 mm, plump, 2-nerved, faces finely strigoso-hirsute; pappi: outer of setae (inconspicuous), inner of 20–30 bristles. 2n = 36.


Phenology: Flowering Jun–Aug(–Sep).
Habitat: Arctic and alpine tundra, snowbed slopes, pond and stream margins, boulder ridges in streambeds, heaths, ledges, dry gravelly slopes
Elevation: (Greenland, 0–)1000–2400(–4000, Colorado, Utah) m

Distribution

V20-737-distribution-map.gif

Greenland, Alta., B.C., Man., Nfld. and Labr. (Labr.), N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Colo., Idaho, Mont., Utah, Wyo., n Eurasia

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Erigeron humilis"
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 +
Graham +
decurrent +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
spatulate;spatulate-oblanceolate +
2mm;7mm +
rugulose +  and muricate +
branched +  and simple +
Arctic Alpine fleabane +  and petite vergerette +
not 2-lipped +  and actinomorphic +
whitish +, bluish purple +  and lavender +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fertile +  and bisexual +
Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. (Labr.) +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +, Colo. +, Idaho +, Mont. +, Utah +, Wyo. +  and n Eurasia +
(Greenland, 0–)1000–2400(–4000, Colorado, Utah) m +
strigoso-hirsute +  and villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Arctic and alpine tundra, snowbed slopes, pond and stream margins, boulder ridges in streambeds, heaths, ledges, dry gravelly slopes +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
turbinate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
reflexing +  and erect +
not coiling +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Jun–Aug(–Sep). +
3-nerved +  and 1-nerved +
strigoso-hirsute +
narrowly elliptic +  and linear-lanceolate +
Edinburgh New Philos. J. +
bearing subulate enations +, hairy +  and bristly +
branched +  and simple +
exalbuminous +
branched +  and simple +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Er igeron +  and E. uniflorus var. unalaschkensis +
Erigeron humilis +
Erigeron +
species +
inflated +  and tubular +
fibrous-rooted +  and rhizomatous +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
tree +, shrub +  and subshrub +