Arnica lessingii

(Torrey & A. Gray) Greene

Pittonia 4: 167. 1900.

Common names: Nodding arnica
Basionym: Arnica angustifolia var. lessingii Torrey & A. Gray Fl. N. Amer. 2: 449. 1843
Synonyms: Arnica lessingii subsp. norbergii Hultén & Maguire
Treatment appears in FNA Volume 21. Treatment on page 369. Mentioned on page 366, 367.
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Plants 8–35 cm. Stems (1–3 together) usually simple, rarely branched (moderately to densely hairy, hairs translucent with purple septa). Leaves (2–) 3–5 (–6) pairs, usually crowded toward stem-bases; petiolate or sessile (petioles short-winged); blades elliptic, lanceolate, or broadly oblanceolate, 3–10 × 1–2.5 cm, margins usually entire proximal to mid-blade, subentire to denticulate distally, apices acute to obtuse, faces: abaxial paler and often glabrous, adaxial slightly hairy. Heads 1 (nodding). Involucres turbinate-campanulate (bases moderately villous, hairs brownish). Phyllaries 11–15, lanceolate to elliptic (apices obtuse, tips blunt, callous). Ray-florets 8–13; corollas yellow (laminae 14–20 mm). Disc-florets: corollas yellow; anthers dark purple. Cypselae brown, 5–6 mm, sparsely strigose (hairs simple, apically pointed) or glabrous; pappi tawny, bristles barbellate. 2n = 38, 57, 76.


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

Distribution

V21-917-distribution-map.gif

B.C., N.W.T., Yukon, Alaska, Asia (Russian Far East)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Arnica lessingii"
76 +, 57 +  and 38 +
not tailed +, rounded +  and obtuse +
dark purple +
connate +  and distinct +
acute;obtuse +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and cymiform +
indeterminate +  and determinate +
Steven J. Wolf +
(Torrey & A. Gray) Greene +
decurrent +
Arnica angustifolia var. lessingii +
compound +  and simple +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
oblanceolate;lanceolate;oblanceolate;lanceolate;elliptic +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Nodding arnica +
stipitate-glandular +  and hairy +
glabrous +  and strigose +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
B.C. +, N.W.T. +, Yukon +, Alaska +  and Asia (Russian Far East) +
0–1500 m +
glabrous +, glandular +, hairy +, stipitate-glandular +, woolly +, villous +, tomentose +, scabrous +, puberulent +, pilose +, hispidulous +  and hirsute +
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-campanulate +
sessile +  and petiolate +
cauline +  and basal +
3 (?) +  and 5 (?) +
deltate +
subentire +  and denticulate +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
Flowering Jun–Sep. +
11 +  and 15 +
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 lessingii subsp. norbergii +
Arnica lessingii +
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 />) +