Arnica unalaschcensis

Lessing

Linnaea 6: 238. 1831.

Common names: Alaska arnica
Treatment appears in FNA Volume 21. Treatment on page 369. Mentioned on page 366, 367.
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Plants 8–30 cm. Stems simple (sparsely to moderately hairy, hairs translucent with purple septa). Leaves 2–5 pairs, mostly cauline; petiolate (proximal) or sessile; blades elliptic-oblanceolate, obovate or spatulate, (3–) 5–12 × 1.5–3 cm, margins usually entire proximal to mid-blade, serrate to dentate distally, apices acute to obtuse or abruptly pointed, faces usually glabrate, sometimes scabrous to sparsely stipitate-glandular. Heads 1 (erect). Involucres hemispheric or turbinate-hemispheric (bases moderately villous). Phyllaries 14–24, lanceolate (apices obtuse, tips blunt, callous). Ray-florets 6–17; corollas yellow (laminae 12–17 mm). Disc-florets: corollas yellow; anthers dark purple. Cypselae brown, 4–5 mm, shortly hispidulous (hairs duplex, apically forked) and stipitate-glandular; pappi tawny, bristles subplumose. 2n = 38.


Phenology: Flowering Jun–Aug.
Habitat: Coastal tundra to alpine slopes
Elevation: 0–1500 m

Distribution

V21-918-distribution-map.gif

Alaska, Asia (Japan), Asia (Russian Far East)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Arnica unalaschcensis"
not tailed +, rounded +  and obtuse +
dark purple +
connate +  and distinct +
acute;obtuse or abruptly pointed +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and cymiform +
indeterminate +  and determinate +
Steven J. Wolf +
Lessing +
decurrent +
compound +  and simple +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
spatulate;obovate;elliptic-oblanceolate +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Alaska arnica +
stipitate-glandular +  and hairy +
stipitate-glandular +  and hispidulous +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
Alaska +, Asia (Japan) +  and Asia (Russian Far East) +
0–1500 m +
scabrous +  and sparsely stipitate-glandular +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Coastal tundra to alpine slopes +
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-hemispheric;hemispheric +
sessile +  and petiolate +
2 (?) +  and 5 (?) +
deltate +
toothed +  and entire +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
Flowering Jun–Aug. +
14 +  and 24 +
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 unalaschcensis +
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 />) +