Flora of North America species comparison

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Arnica spathulata

Klamath arnica, spatulate arnica
Habit Plants 15–45+ cm.
Stems

simple or branched.
Leaves

3–5 pairs, sometimes crowded toward bases (basal leaves often persistent on sterile rosettes); petiolate (petioles mostly broadly winged, 1–9 × 0.2–1.5 cm);

blades elliptic-ovate to spatulate, 2–8 × 1–4 cm, margins subentire to mostly irregularly dentate, apices acute, faces sparsely to densely villous, stipitate-glandular.
Involucres

turbinate-campanulate.
Ray florets

0.
Disc florets

15–50;

corollas yellow;

anthers yellow.
Phyllaries

8–15, broadly to narrowly lanceolate.
Heads

1, or 3–9(–25).
Cypselae

black, 5–10 mm, sparsely stipitate-glandular;

pappi white, bristles barbellate.
2n

= 38, 76.

Arnica spathulata
Phenology Flowering Apr–Jul.
Habitat Usually serpentine soils, open, dry oak–conifer forests, disturbed areas
Elevation 200–1500 m (700–4900 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 376.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica
Sibling taxa
A. acaulis, A. angustifolia, A. cernua, A. chamissonis, A. cordifolia, A. dealbata, A. discoidea, A. fulgens, A. gracilis, A. griscomii, A. lanceolata, A. latifolia, A. lessingii, A. lonchophylla, A. longifolia, A. louiseana, A. mollis, A. nevadensis, A. ovata, A. parryi, A. rydbergii, A. sororia, A. unalaschcensis, A. venosa, A. viscosa
Synonyms A. eastwoodiae, A. spathulata subsp. eastwoodiae, A. spathulata var. eastwoodiae
Name authority Greene: Pittonia 3: 103. (1896)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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