Crocanthemum scoparium

"Crocanthemum scoparium" is a species of rockrose which is endemic to California. Its common names include peak rockrose and peak rushrose. One variety is known as Bisbee Peak rushrose.
It is found in dry, sandy areas in hills and low mountains.
Description.
"Crocanthemum scoparium" is a small perennial shrub bearing long, smooth stems and small flowers each with five bright yellow petals.