Erythranthe tilingii
It is native to much of western North America, from Alaska to California to New Mexico to Montana. It grows in moist and wet habitats, such as streambanks and mountain meadows, and is generally found at high elevation. "Erythranthe tilingii" is a rhizomatous perennial herb growing 2 to 35 centimeters tall. The oppositely arranged oval leaves may be several centimeters long and some are borne on short petioles. The yellow flower may be over 4 centimeters long, its narrow tubular throat opening into a wide, two-lipped mouth. The base of the flower tube is encapsulated in a calyx of sepals with uneven lobes. "Erythranthe tilingii" is often nearly impossible to distinguish from its common relative, "Mimulus guttatus", as their characteristics can intergrade; one of the most notable differences is the arrangement of the flowers, which are axial in "M. tilingii" but in a raceme in "M. guttatus". By 2014 three species that were formerly been part of "E. tilingii" had been made their own separate species: "Erythranthe caespitosa", "Erythranthe corallina", "Erythranthe minor".
Description
It was formerly known as "Mimulus tilingii".