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.

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 +
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 +
1.5cm;3cm +
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 />) +