Erigeron glabellus var. pubescens

Hooker

Fl. Bor.-Amer. 2: 19. 1834.

Endemic
Synonyms: Erigeron asper var. pubescens (Hooker) Breitung Erigeron glabellus subsp. pubescens (Hooker) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 332. Mentioned on page 331.

Stems hirsute to hirsuto-villous (hairs spreading).


Phenology: Flowering (May–)Jun–Aug.
Habitat: Gravel river bars, streamsides, gravelly hillsides, meadows, open woods
Elevation: 900–3100 m

Distribution

V20-755-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Sask., Yukon, Alaska, Colo., Idaho, Minn., Mont., N.Dak., S.Dak., Wis., Wyo.

Discussion

A. E. Porsild (1975) noted that in Yukon, var. pubescens “is well established along highways and townsites, near existing and former gold-mining camps, and was most likely introduced with shipments of baled hay in the early years of gold mining.”

Plants with appressed cauline vestiture (var. glabellus) are more common in the southern range, while, at least in Alaska, Yukon, Northwest Territories, Alberta, and British Columbia, plants mostly have spreading cauline vestiture (var. pubescens). The two taxa apparently overlap over a considerable area, however, and some individual collections show plants similar in all respects except stem vestiture: some have antrorsely appressed hairs and some have spreading hairs (e.g., Saskatchewan: Ledingham 46-2, 46-19, 48-112, all BRIT; New Mexico: Talbot 1093, LL). Marked variability within Erigeron glabellus is emphasized by the many names proposed at specific rank for forms of the species, mostly by Greene and Lunell (see A. Cronquist 1947). The biology and taxonomy of this complex need modern study.

Selected References

None.

Lower Taxa

None.
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 +
Hooker +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
oblanceolate +  and oblanceolate-spatulate +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
decurrent +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
fibrous-rooted +, branched +, simple +  and rhizomatous +
not 2-lipped +  and actinomorphic +
white +  and pink or blue +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 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 /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Minn. +, Mont. +, N.Dak. +, S.Dak. +, Wis. +  and Wyo. +
900–3100 m +
strigose +, hirsuto-villous +  and sparsely strigose or glabrate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Gravel river bars, streamsides, gravelly hillsides, meadows, open woods +
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 /> (0.9 cm9 mm <br />0.009 m <br />) +
turbinate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
dentate +  and entire +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering (May–)Jun–Aug. +
hirsute +  and strigose +
narrowly elliptic +  and linear-lanceolate +
Fl. Bor.-Amer. +
bearing subulate enations +, hairy +  and bristly +
fibrous-rooted +, branched +, simple +  and rhizomatous +
exalbuminous +
prostrate +  and decumbent +
ascending +  and erect +
appendaged +  and truncate +
papillate +  and smooth +
Erigeron asper var. pubescens +  and Erigeron glabellus subsp. pubescens +
Erigeron glabellus var. pubescens +
Erigeron glabellus +
variety +
inflated +  and tubular +
50 cm500 mm <br />0.5 m <br /> (70 cm700 mm <br />0.7 m <br />) +
perennial +  and biennial +
7 cm70 mm <br />0.07 m <br /> (50 cm500 mm <br />0.5 m <br />) +
tree +, shrub +  and subshrub +