Arnica viscosa
Proc. Amer. Acad. Arts 13: 374. 1878.
Common names: Mt. Shasta arnica
Endemic
Synonyms: Chrysopsis shastensis Jepson Raillardella paniculata Greene
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. 2n = 38.
Phenology: Flowering Aug–Sep.
Habitat: Open, rocky subalpine to alpine
Elevation: 1700–2500 m
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Arnica viscosa"
yellow +
introrse +
connate +
herbaceous +
acute +
scarious +
absent +
hirsute +
papillate +
continuous +
decurrent +
obovate-oblong;ovate-oblong +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
6;80 +
absent +
sessile +
Mt. Shasta arnica +
zygomorphic +
cream +
monomorphic +
dark gray +
dimorphic +
stipitate-glandular +
4.5mm;6.5mm +
staminate +
straight +
scabrellous +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
discoid +
indeterminate +
10;20 +
surrounding +
turbinate +
opposite +
deltate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
fragile +
falling +
aristate +
fine +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
unequal +
Proc. Amer. Acad. Arts +
1878 +
pistillate +
absent +
fertile +
epaleate +
convex +
fibrous +
distinct +
exalbuminous +
modifed +
Endemic +
alternate +
branched +
erect +
2-branched +
papillate +
Arnica viscosa +
Arnica +
species +
shorter +
longer +
perennial +