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Arnica lessingii
Greene
(redirected from:
Arnica angustifolia var. lessingii
)
Family:
Asteraceae
Lessing's Leopardbane
[
Arnica angustifolia var. lessingii
,
more
Arnica lessingii subsp. norbergii
Hultén & Maguire
]
FNA
Resources
Steven J. Wolf in Flora of North America (vol. 21)
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.
2
n
= 38, 57, 76.
Flowering Jun-Sep. Coastal tundra to alpine slopes; 0-1500 m; B.C., N.W.T., Yukon; Alaska; Asia (Russian Far East).
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This project made possible by
National Science Foundation Award EF 1702516
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