Arnica angustifolia

Vahl in G. C. Oeder et al.

in G. C. Oeder et al., Fl. Dan. 9(26): 5, plate 1524. 1816.

Common names: Narrowleaf arnica
Synonyms: Arnica alpina subsp. angustifolia (Vahl) Maguire Arnica alpina var. angustifolia (Vahl) Fernald
Treatment appears in FNA Volume 21. Treatment on page 369. Mentioned on page 368.

Plants 5–40 cm. Stems usually simple, rarely branched. Leaves 1–5 pairs, mostly cauline; petiolate (petioles broadly to narrowly winged, shorter than blades); blades broadly lanceolate to linear, 2–20 × 0.3–4 cm, margins entire or irregularly denticulate or dentate, apices acute or acuminate, faces glabrous or densely woolly-villous and stipitate-glandular. Heads 1–3 (–5; erect). Involucres hemispheric. Phyllaries 9–22, usually narrowly to broadly lanceolate, sometimes oblanceolate. Ray-florets 6–16; corollas yellow. Disc-florets: corollas yellow; anthers yellow. Cypselae brown, 3–8 mm, densely hirsute, rarely glandular; pappi white, bristles barbellate.

Distribution

V21-919-distribution-map.gif

Alta., B.C., Man., N.W.T., Nfld. and Labr. (Nfld.), Nunavut, Ont., Que., Sask., Yukon, Alaska, Mont., Europe, Asia

Discussion

Subspecies 2 (2 in the flora).

Selected References

None.

Key

1 Leaves linear to broadly lanceolate, faces glabrousor moderately villous Arnica angustifolia subsp. angustifolia
1 Leaves narrowly lanceolate, faces densely white-woolly-villous Arnica angustifolia subsp. tomentosa
... more about "Arnica angustifolia"
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 +
Vahl in G. C. Oeder et al. +
decurrent +
compound +  and simple +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
broadly lanceolate;linear +
0.3cm;4cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Narrowleaf arnica +
stipitate-glandular +  and hairy +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.W.T. +, Nfld. and Labr. (Nfld.) +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Mont. +, Europe +  and Asia +
stipitate-glandular +, woolly-villous +  and glabrous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
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 />) +
hemispheric +
1 (?) +  and 5 (?) +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
dentate +, denticulate +  and entire +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
9 +  and 22 +
in G. C. Oeder et al., Fl. Dan. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
4 +  and 20 +
exalbuminous +
branched +  and simple +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Arnica alpina subsp. angustifolia +  and Arnica alpina var. angustifolia +
Arnica angustifolia +
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 />) +