Iliamna longisepala, known by the common name long sepal globemallow,[1] is a perennial plant species in the Malvaceae family.

Long haired perennial plant with 5-9 lobed leaves.

Flowers in racemes that are pink to lavender.

[2] The slightly longer sepal length distinguishes this species from similar looking species like the more common Iliamna rivularis and are around 1.5 cm long.

[2] This plant grows at lower elevations from sagebrush desert to Ponderosa pine forests east of the Cascade crest in Washington State, primarily in Chelan and Douglas counties.