Erigeron pumilus

Nuttall

Gen. N. Amer. Pl. 2: 147. 1818.

Common names: Shaggy fleabane
Endemic
Treatment appears in FNA Volume 20. Treatment on page 288. Mentioned on page 270, 289, 290.

Perennials, 5–30 (–50) cm; taprooted, caudices with relatively short and thick branches. Stems erect, hirsute to hispido-hirsute (often with slightly deflexed hairs), minutely to stipitate-glandular. Leaves basal (persistent) and cauline (petioles prominently ciliate, hairs thick-based, spreading); basal blades oblanceolate to narrowly oblanceolate, 20–80 × 1–4 (–5) mm, margins entire, faces hispid to hispido-hirsute, little, if at all, glandular; cauline on distal 1/2–3/4 of stems, blades becoming linear-lanceolate, little reduced distally. Heads 1–5 (–50). Involucres 4–7 × 7–15 mm. Phyllaries in 2–4 series (midvein region orange to yellowish), hirsute to hispido-hirsute, minutely glandular. Ray-florets 50–100; corollas white to pink, less commonly bluish, 6–15 mm, laminae reflexing. Disc corollas 3–5 mm (throats distinctly indurate and inflated, glabrous or sparsely puberulent with glandular-viscid, hairs blunt). Cypselae 1.4–1.8 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae or subulate scales (0.1–0.3 mm), inner of 12–27 bristles.

Distribution

V20-601-distribution-map.gif

Alta., B.C., Sask., Calif., Colo., Idaho, Kans., Mont., N.Dak., Nebr., Nev., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Pappi: outer of coarse bristles or setiform scales, inner of 12–20 bristles; rays usually pink, sometimes white; indurate portion of disc corollas relatively dull, glabrous or slightly puberulent Erigeron pumilus var. intermedius
1 Pappi: outer of inconspicuous, well-developed setae, inner of 15–27 bristles; rays white; indurate portion of disc corollas shiny, glabrous Erigeron pumilus var. pumilus
... more about "Erigeron pumilus"
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 +
Nuttall +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
oblanceolate +  and narrowly oblanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decurrent +
linear-lanceolate +
reduced +
rugulose +  and muricate +
Shaggy fleabane +
not 2-lipped +  and actinomorphic +
bluish +, white +  and pink +
0.6 cm6 mm <br />0.006 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 +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
fertile +  and bisexual +
Alta. +, B.C. +, Sask. +, Calif. +, Colo. +, Idaho +, Kans. +, Mont. +, N.Dak. +, Nebr. +, Nev. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
strigose +, hispid +  and hispido-hirsute +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
turbinate;hemispheric +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
3-nerved +  and 1-nerved +
hirsute +  and hispido-hirsute +
narrowly elliptic +  and linear-lanceolate +
Gen. N. Amer. Pl. +
bearing subulate enations +, hairy +  and bristly +
subulate +
exalbuminous +
branched +  and simple +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron pumilus +
Erigeron +
species +
inflated +  and tubular +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
tree +, shrub +  and subshrub +