Erigeron argentatus

A. Gray

Proc. Amer. Acad. Arts 8: 649. 1873.

Common names: Silver fleabane
Endemic
Treatment appears in FNA Volume 20. Treatment on page 295. Mentioned on page 276.

Perennials, (8–) 15–30 (–40) cm; taprooted, caudices branched, retaining old leaf-bases. Stems erect, densely gray-green to silvery-strigose (hairs white, closely appressed), eglandular. Leaves basal (persistent) and cauline (leaf-bases broadened or not, not thickened and whitish-indurate); basal blades spatulate to oblanceolate or narrowly oblanceolate, (15–) 20–50 (–70) × 1–4 (–6) mm, margins entire, faces silvery-strigose, eglandular; cauline blades linear to linear-oblanceolate, much reduced distally. Heads 1. Involucres 5.5–9 × (10–) 12–22 mm. Phyllaries in 3–4 series, silvery-strigose (hairs closely appressed), minutely glandular. Ray-florets 20–50 (–75); corollas blue to lavender, less commonly pink or white, 9–15 mm, laminae coiling. Disc corollas 3.8–5.6 mm. Cypselae (terete to slightly compressed) 2.8–3.4 mm, 6–8-nerved, faces strigoso-pilose; pappi: outer of setae or lanceolate scales, inner of 25–40 bristles. 2n = 18.


Phenology: Flowering May–Jul.
Habitat: Ridges and slopes in dry, sandy or gravelly soil, desert shrub, sagebrush, juniper and pinyon-juniper
Elevation: 1300–2500 m

Distribution

V20-627-distribution-map.gif

Ariz., Calif., Nev., Utah.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Erigeron argentatus"
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 +
A. Gray +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
spatulate +  and oblanceolate or narrowly oblanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decurrent +
linear;lanceolate oblanceolate or spatulate +
rugulose +  and muricate +
linear +  and linear-oblanceolate +
Silver fleabane +
not 2-lipped +  and actinomorphic +
white +, pink +, blue +  and lavender +
0.9 cm9 mm <br />0.009 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 +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.56 cm5.6 mm <br />0.0056 m <br />) +
fertile +  and bisexual +
Ariz. +, Calif. +, Nev. +  and Utah. +
1300–2500 m +
strigoso-pilose +  and silvery-strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Ridges and slopes in dry, sandy or gravelly soil, desert shrub, sagebrush, juniper and pinyon-juniper +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
turbinate;hemispheric +
1.2 cm12 mm <br />0.012 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering May–Jul. +
3-nerved +  and 1-nerved +
silvery-strigose +
narrowly elliptic +  and linear-lanceolate +
Proc. Amer. Acad. Arts +
bearing subulate enations +, hairy +  and bristly +
lanceolate +
exalbuminous +
gray-green +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron argentatus +
Erigeron +
species +
inflated +  and tubular +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
tree +, shrub +  and subshrub +