Erythranthe parishii is an annual herb growing up to 50 centimeters in maximum height with a stout, hairy stem. The oppositely arranged oval or widely lance-shaped leaves are up to 7.5 centimeters long. The narrow, tubular base of the flower is encapsulated in a ribbed calyx of
sepals with pointed lobes. The five-lobed flower is almost white, often tinged with pink. ==References==