[Members of the Genus Arnica with Discoid Flower Heads in the Columbia River Gorge of Oregon and Washington]

Rayless Arnica, Rayless Leopardbane

Arnica discoidea

Synonyms: Arnica discoidea var. eradiata, Arnica grayi, Arnica parviflora, Arnica parviflora ssp. alata, Arnica parviflora ssp. parviflora

Rayless Arnica, Rayless Leopardbane: Arnica discoidea (Synonyms: Arnica discoidea var. eradiata, Arnica grayi, Arnica parviflora, Arnica parviflora ssp. alata, Arnica parviflora ssp. parviflora)

Rayless arnica blooming in leaf litter in an Oregon white oak forest on the west side of the Klickitat River several miles south of Leidl Park, Klickitat Wildlife Area.........May 15, 2013.

Rayless Arnica, Rayless Leopardbane: Arnica discoidea (Synonyms: Arnica discoidea var. eradiata, Arnica grayi, Arnica parviflora, Arnica parviflora ssp. alata, Arnica parviflora ssp. parviflora) - Leaves of Rayless Arnica, Rayless Leopardbane: Arnica discoidea (Synonyms: Arnica discoidea var. eradiata, Arnica grayi, Arnica parviflora, Arnica parviflora ssp. alata, Arnica parviflora ssp. parviflora) - Leaves of Rayless Arnica, Rayless Leopardbane: Arnica discoidea (Synonyms: Arnica discoidea var. eradiata, Arnica grayi, Arnica parviflora, Arnica parviflora ssp. alata, Arnica parviflora ssp. parviflora)

Rayless arnica blooming in leaf litter in an Oregon white oak forest on the west side of the Klickitat River several miles south of Leidl Park, Klickitat Wildlife Area.........May 15, 2013.
Paul Slichter