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Arnica viscosa
A. Gray
Family:
Asteraceae
Mt. Shasta Leopardbane
FNA
Resources
Steven J. Wolf in Flora of North America (vol. 21)
Plants
20-50 cm.
Stems
branched (prominently ribbed, strongly stipitate-glandular; caudices woody).
Leaves
5-10 pairs (main stems, 2-6 pairs on branches; basal withered by flowering), cauline; sessile; blades obovate-oblong to ovate-oblong, (1-)2-4(-5) × 1-3 cm, margins ± entire, apices acute, faces sparsely to densely pilose, densely stipitate-glandular.
Heads
10-20.
Involucres
narrowly turbinate.
Phyllaries
10-20, broadly lanceolate (stipitate-glandular).
Ray florets
0.
Disc florets
10-30; corollas cream; anthers yellow.
Cypselae
dark gray, 4.5-6.5 mm, stipitate-glandular;
pappi
usually white, rarely tawny, bristles barbellate to subplumose.
2
n
= 38.
Flowering Aug-Sep. Open, rocky subalpine to alpine; 1700-2500 m; Calif., Oreg.
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