Arnica nevadensis

A. Gray
Proc. Amer. Acad. Arts 19: 55. 1883.
Common names: Nevada arnica Sierra arnica
Endemic
Synonyms: Arnica tomentella Greene
Treatment appears in FNA Volume 21. Treatment on page 374. Mentioned on page 368.

Plants 10–50 cm. Stems simple. Leaves 2–3 pairs, mostly cauline (basal leaves often persistent on sterile rosettes); petiolate (petioles narrowly to broadly winged); blades elliptic to ovate, 3–8 × 2–4 cm, margins entire or denticulate, apices acute to rounded, faces stipitate-glandular. Heads 1(–3). Involucres campanulate-turbinate. Phyllaries 10–16, oblanceolate. Ray florets 6–14; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae dark gray, 6–9 mm, stipitate-glandular; pappi white or tawny, bristles barbellate to subplumose. 2n = 76.


Phenology: Flowering Jul–Aug.
Habitat: Coniferous forests, meadows, rocky slopes
Elevation: 1500–3000 m

Distribution

V21-940-distribution-map.gif

Calif., Nev., Oreg., Wash.

Discussion

Selected References

None.

Lower Taxa

None.