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.

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 +
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 +
1cm;2.5cm +
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 />) +