| Iliamna, Mallows, Iliamna remota, Phymosia, Sphaeralcea|
Iliamna rivularis, known by the common name streambank wild hollyhock, is a perennial plant species in the family Malvaceae. The plant grows 3 to 6 feet tall from a woody caudex and produces dense racemes of soft lavender-pink flowers. Plants blooms from June through August. They have five to seven lobed, cordate leaves. Seeds have a very hard coat and can remain viable in the soil for more than 50 years, seed germination is often triggered after a wildfire. This species is native to sunny mountain streambanks, meadows, and open forest slopes from east of the Cascade Range, from British Columbia and Alberta to Montana and south to Oregon and Colorado.
Iliamna rivularis var. rivularis, which is often called Iliamna remota and has the common name Kankakee globe-mallow, has suffered drastic population declines in the eastern USA; largely from an altered fire regimen caused by long-term fire suppression which has changed the forest canopy structure. Shading limits plant growth and seed germination, additionally the seeds germinate after scarification by fire.
Iliamna rivularis Wikipedia