Erigeron maniopotamicus

G. L. Nesom & T. W. Nelson

Sida 21: 673, fig. 1. 2004.

Common names: Mad River fleabane
Treatment appears in FNA Volume 20. Treatment on page 279. Mentioned on page 275.

Perennials, 10–22 (–27) cm, taprooted, caudices usually simple, rarely with branches to 20 cm. Stems ascending to decumbent-ascending (usually basally purplish), sparsely to densely strigose (basal-cells inclined, hairs even-width), eglandular. Leaves basal (persistent) and cauline; blades (strongly to weakly 3-nerved) oblanceolate to spatulate-oblanceolate, 30–100 × (3–) 5–12 (–14) mm, cauline gradually reduced distally or not, usually continuing to near heads, margins entire, faces hirsuto-pilose to weakly pilose, eglandular. Heads 1 (–4) (on peduncles 0.5–5 cm), held well beyond leaves at peak flowering, from branches near midstem (or slightly more distal). Involucres (5–) 6–7 × 9–12 (–14) mm. Phyllaries in 2–3 (–4) series, (elliptic to oblong-oblanceolate, abruptly acuminate), hirsuto-strigose to pilose, densely villous at bases, usually eglandular, sometimes sparsely glandular. Ray-florets (16–) 21–33; corollas white to pinkish or purplish, 10–12 mm, laminae not (or weakly) coiling or reflexing. Disc corollas 3.2–3.8 mm. Cypselae 2–2.5 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 16–20 bristles.


Phenology: Flowering Jun–Aug.
Habitat: Dry, barren meadows and openings in mixed conifer woodlands
Elevation: 1300–1500 m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron maniopotamicus"
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 +
G. L. Nesom & T. W. Nelson +
decurrent +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
oblanceolate;spatulate-oblanceolate +
5mm;12mm +
rugulose +  and muricate +
Mad River fleabane +
not 2-lipped +  and actinomorphic +
white +  and pinkish or purplish +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
fertile +  and bisexual +
1300–1500 m +
strigose +, hirsuto-pilose +  and weakly pilose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, barren meadows and openings in mixed conifer woodlands +
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 /> (0.6 cm6 mm <br />0.006 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 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 /> (0.7 cm7 mm <br />0.007 m <br />) +
turbinate;hemispheric +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
not coiling +
petiolate +  and sessile +
cauline +  and basal +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
2-carpellate +
Flowering Jun–Aug. +
villous +, hirsuto-strigose +  and pilose +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
prostrate +  and decumbent +
ascending +  and decumbent-ascending +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron maniopotamicus +
Erigeron +
species +
inflated +  and tubular +
22 cm220 mm <br />0.22 m <br /> (27 cm270 mm <br />0.27 m <br />) +
10 cm100 mm <br />0.1 m <br /> (22 cm220 mm <br />0.22 m <br />) +
tree +, shrub +  and subshrub +