Erigeron purpuratus

Greene

Pittonia 4: 155. 1900.

Common names: Purple fleabane
Endemic
Treatment appears in FNA Volume 20. Treatment on page 302. Mentioned on page 265, 303.

Perennials, (2–) 3–9 (–14) cm; taprooted, caudices diffuse with extensive systems of rhizomelike, relatively long and slender branches. Stems erect (simple, ± scapiform), villous, minutely glandular. Leaves mostly basal (persistent); blades linear to narrowly oblanceolate, 15–30 (–45) × 1–2.5 (–3) mm, margins entire or (mostly on early leaves) with 1–2 shallow lateral lobes or teeth, faces sparsely hirsuto-villous or glabrous, minutely glandular. Heads 1. Involucres 6–9 (–10) × 9–15 mm. Phyllaries in 2–3 series, sparsely pilose (hairs 1–3 mm, with colored cross-walls) or glabrous, minutely glandular. Ray-florets 40–90; corollas white to pink or purplish, 5–9 mm, laminae (filiform, 0.3–0.8 mm wide, involute) erect, not coiling or reflexing. Disc corollas 4–5 mm. Cypselae 1.8–2.7 mm, 2-nerved, faces sparsely strigillose to glabrate; pappi: outer 0 (or inconspicous), inner of 28–40 (pinkish to purplish) bristles. 2n = 18.


Phenology: Flowering Jun–Aug.
Habitat: Sandy and gravelly stream banks, gravel bars, sandy beaches, gravelly slopes, alpine tundra
Elevation: 100–1400 m

Discussion

The erect, involute ray laminae of Erigeron purpuratus, E. denalii, and E. pallens distinguish them from other species of sect. Tridactylia. Distinctions among these species were studied by G. L. Nesom and D. F. Murray (2004).

Selected References

None.

Lower Taxa

None.
... more about "Erigeron purpuratus"
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 +
Greene +
decurrent +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
linear;narrowly oblanceolate +
1mm;2.5mm +
rugulose +  and muricate +
Purple fleabane +
not 2-lipped +  and actinomorphic +
white +  and pink or purplish +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
fertile +  and bisexual +
Yukon +  and Alaska. +
100–1400 m +
sparsely strigillose +  and glabrate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy and gravelly stream banks, gravel bars, sandy beaches, gravelly slopes, alpine tundra +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 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 +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
reflexing +  and erect +
not coiling +
petiolate +  and sessile +
erect;spreading +
deltate +
with 1-2 shallow lateral lobes or teeth +  and entire +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Jun–Aug. +
3-nerved +  and 1-nerved +
glabrous +  and pilose +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
branched +  and simple +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
extensive +
Erigeron purpuratus +
Erigeron +
species +
inflated +  and tubular +
9 cm90 mm <br />0.09 m <br /> (14 cm140 mm <br />0.14 m <br />) +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
tree +, shrub +  and subshrub +