Erigeron pygmaeus

(A. Gray) Greene

Fl. Francisc., 390. 1897.

Common names: Pygmy fleabane
Endemic
Basionym: Erigeron nevadensis var. pygmaeus A. Gray Proc. Amer. Acad. Arts 8: 649. 1873 (as nevadense var. pygmaeum)
Treatment appears in FNA Volume 20. Treatment on page 292. Mentioned on page 271.

Perennials, 1–6 (–14) cm; taprooted, caudex branches relatively thick, retaining old leaf-bases. Stems erect, hirtellous to sparsely hirsute (hairs straight-spreading, not deflexed), densely minutely glandular. Leaves basal (persistent) and cauline (petioles prominently ciliate, hairs spreading, thick-based); blades linear to narrowly oblanceolate or subspatulate (usually folding), 20–35 (–45) × 2–4 mm; cauline often abruptly reduced distally, margins entire, faces hirsuto-strigose, densely minutely glandular. Heads 1. Involucres 4–7 × 6–15 mm. Phyllaries in 2–3 series (commonly purplish to purplish black, sometimes only at tips, midvein region greenish), hirsute, densely minutely glandular. Ray-florets 20–37; corollas usually blue or purple, rarely white, 4–10 mm, laminae tardily, often only slightly, reflexing. Disc corollas 3.7–5.3 mm (throats tubular). Cypselae 2.3–2.8 mm, 2-nerved, faces sparsely strigose; pappi: outer of inconspicuous, fine setae, inner of 15–25 bristles. 2n = 18.


Phenology: Flowering Jul–Aug.
Habitat: Rocky ridges or slopes, often talus, above timberline, sometimes alpine
Elevation: 2900–4100 m

Discussion

Erigeron pygmaeus is found in the Sierra Nevada.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron pygmaeus"
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) Greene +
decurrent +
Erigeron nevadensis var. pygmaeus +
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
linear;narrowly oblanceolate or subspatulate +
2mm;4mm +
rugulose +  and muricate +
Pygmy fleabane +
not 2-lipped +  and actinomorphic +
white +, purple +  and blue +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
fertile +  and bisexual +
Calif. +  and Nev. +
2900–4100 m +
strigose +  and hirsuto-strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky ridges or slopes, often talus, above timberline, sometimes alpine +
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 +
0.6 cm6 mm <br />0.006 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 +
Flowering Jul–Aug. +
3-nerved +  and 1-nerved +
narrowly elliptic +  and linear-lanceolate +
Fl. Francisc., +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
inconspicuous +
branched +  and simple +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron pygmaeus +
Erigeron +
species +
inflated +  and tubular +
6 cm60 mm <br />0.06 m <br /> (14 cm140 mm <br />0.14 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
tree +, shrub +  and subshrub +