Arnica longifolia

D. C. Eaton in S. Watson

in S. Watson, Botany (Fortieth Parallel), 186. 1871.

Common names: Spearleaf arnica
Endemic
Synonyms: Arnica longifolia subsp. myriadenia (Piper) Maguire Arnica myriadenia
Treatment appears in FNA Volume 21. Treatment on page 374. Mentioned on page 368.

Plants 30–60 (–110) cm. Stems (often relatively numerous, clustered in clonal patches) simple. Leaves 5–7 pairs, mostly cauline (basal leaves usually withered by flowering); sessile or subsessile (proximalmost with connate-sheathing bases); blades lanceolate to lance-elliptic, 5–12 (–15) × 1.5–3.5 cm, margins usually entire, rarely denticulate, apices acute to acuminate, faces scabrid-puberulent, sometimes glandular (distal leaves not much reduced). Heads 3–20 (–35). Involucres turbinate-campanulate. Phyllaries 11–15 (–20), narrow to broadly lanceolate. Ray-florets 6–15; corollas yellow. Disc-florets 6–11; corollas yellow; anthers yellow. Cypselae brown to black, 3–7 mm, glabrous or sparsely hirsutulous, stipitate-glandular; pappi stramineous to tawny, bristles barbellate to subplumose. 2n = 57, 76.


Phenology: Flowering Jun–Oct.
Habitat: Montane coniferous forests to alpine, usually moist areas, stream banks or late snow-melt areas
Elevation: 1300–3700 m

Distribution

V21-937-distribution-map.gif

Alta., B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Arnica longifolia"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and cymiform +
indeterminate +  and determinate +
Steven J. Wolf +
D. C. Eaton in S. Watson +
decurrent +
compound +  and simple +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
lanceolate;lance-elliptic +
1.5cm;3.5cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellate +  and subplumose +
connate +  and distinct +
Spearleaf arnica +
stipitate-glandular +  and hairy +
brown +  and black +
stipitate-glandular +, hirsutulous +  and glabrous +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1300–3700 m +
scabrid-puberulent +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Montane coniferous forests to alpine, usually moist areas, stream banks or late snow-melt areas +
discoid +  and radiate +
in cymiform or corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
turbinate-campanulate +
subsessile +  and sessile +
5 (?) +  and 7 (?) +
deltate +
denticulate +
2-carpellate +
subplumose +  and barbellate +
stramineous +  and tawny +
persistent +
10 +  and 50 +
aristate +
Flowering Jun–Oct. +
11 +  and 15 +
in S. Watson, Botany (Fortieth Parallel), +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
4 +  and 20 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Arnica longifolia subsp. myriadenia +  and Arnica myriadenia +
Arnica longifolia +
species +
campanulate +  and cylindric +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
1 cm10 mm <br />0.01 m <br /> (80 cm800 mm <br />0.8 m <br />) +
toothed +  and entire +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +