Arnica spathulata
| Arnica spathulata | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Tribe: | Heliantheae |
| Genus: | Arnica |
| Species: | A. spathulata |
| Binomial name | |
| Arnica spathulata Greene[1] | |
Arnica spathulata is an uncommon species of arnica known by the common name Klamath arnica.[2] It is native to the Klamath Mountains of northern California and southern Oregon, where it grows in woodland habitat, often on serpentine soils.[2]
It is a rhizomatous perennial herb producing one or more hairy, glandular stems 10 to 50 centimeters tall.[2] There are several pairs of broadly lance-shaped leaves along the stem, and a cluster of leaves about the base of the stem.[2] The basal leaves are up to about 15 centimeters long and the cauline leaves, those higher on the stem, are somewhat shorter.[2]
The inflorescence holds many flower heads lined with phyllaries coated in long, white hairs.[2] The flower head is discoid, containing only yellow disc florets and no ray florets.[2] The fruit is an achene up to a centimeter long, not counting its white pappus.[2]