Arnica louiseana

Farr

Ottawa Naturalist 20: 109. 1906.

Common names: Lake Louise arnica snow arnica
Endemic
Treatment appears in FNA Volume 21. Treatment on page 371. Mentioned on page 368.
Revision as of 22:58, 29 July 2020 by imported>Volume Importer
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Plants 5–20 cm. Stems simple. Leaves 1–3 pairs, mostly cauline (shorter plants often with leaves crowed mostly toward bases); petiolate; blades elliptic, oblong, or ovatelanceolate, 1.5–7.5 × 0.5–2 cm, margins usually entire, rarely denticulate or slightly undulate, apices usually obtuse, sometimes acute or acuminate, faces glabrous or hispidulous-puberulent, ± densely stipitate-glandular. Heads usually 1, sometimes 2–3 (nodding at flowering). Involucres campanulate-turbinate. Phyllaries 10–20, narrowly lanceolate (stipitate-glandular). Ray-florets 7–10; corollas yellow. Disc-florets: corollas yellow; anthers yellow. Cypselae brown, 3–5 mm, abaxially glabrous, adaxially sparsely hirsute or glabrous throughout, usually stipitate-glandular toward apices, sometimes densely stipitate-glandular throughout; pappi white, bristles barbellate. 2n = 76, 95.


Phenology: Flowering Jul–Aug.
Habitat: Exposed tundra slopes and calcareous rock slides
Elevation: 1800–2100 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Arnica louiseana"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
acuminate;acute;obtuse +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and cymiform +
indeterminate +  and determinate +
Steven J. Wolf +
decurrent +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
ovatelanceolate;oblong;ovatelanceolate;oblong;elliptic +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Lake Louise arnica +  and snow arnica +
stipitate-glandular +  and hairy +
stipitate-glandular +, glabrous +  and hirsute +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +  and B.C. +
1800–2100 m +
stipitate-glandular +, hispidulous-puberulent +  and glabrous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Exposed tundra slopes and calcareous rock slides +
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 />) +
campanulate-turbinate +
1 (?) +  and 3 (?) +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
undulate +, denticulate +  and entire +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
Flowering Jul–Aug. +
10 +  and 20 +
Ottawa Naturalist +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
4 +  and 20 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Arnica louiseana +
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 />) +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +