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Arnica latifolia
Bongard
No occurrences found
Family:
Asteraceae
broadleaf arnica
[
Arnica latifolia var. angustifolia
Herder]
Images
not available
FNA
Resources
Steven J. Wolf in Flora of North America (vol. 21)
Plants
10-50 cm.
Stems
usually simple, sometimes branched distally.
Leaves
2-4(-6) pairs, cauline (basal leaves often persistent on sterile rosettes), petiolate (proximal, petioles relatively short, broadly winged) or sessile (mid and distal); blades lance-elliptic to ovate, 2-10 × 1-6 cm, margins serrate to dentate, apices obtuse to acute, faces glabrous or sparsely villous.
Heads
1 or 3-5(-9).
Involucres
narrowly turbinate.
Phyllaries
8-20, lanceolate to oblanceolate.
Ray florets
8-15; corollas yellow.
Disc florets
20-90; corollas yellow; anthers yellow.
Cypselae
dark brown, 5-9 mm, sparsely villous;
pappi
white, bristles barbellate.
2
n
= 38, 76. Flowering Jul-Aug. Relatively moist, montane conifer forests to subalpine meadows; 500-3300 m; Alta., B.C., N.W.T., Yukon; Alaska, Calif., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.
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