''Iliamna rivularis'', known by the common name streambank wild hollyhock, is a perennial plant species in the family

Malvaceae Malvaceae, or the mallows, is a family of flowering plants estimated to contain 244 genera with 4225 known species. Well-known members of economic importance include okra, cotton, cacao and durian. There are also some genera containing familiar ...

Description

The plant typically grows 3 to 6 feet tall from a woody

caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...

and produces dense

raceme A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...

s 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 A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of Combustibility and flammability, combustible vegetation. Depending on the type of vegetation present, a wildfire ...

Distribution

This species is native to sunny mountain streambanks, meadows, and open forest slopes from east of the

Cascade Range The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, ...

, from

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

and

Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Ter ...

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

and south to

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

and

Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...

. ''Iliamna rivularis'' var. ''rivularis'', which is often called ''

Iliamna remota ''Iliamna remota'', commonly known as the Kankakee mallow, is an endangered species of flowering plant in the mallow family. It is endemic to a single location, the Langham Island in Kankakee River State Park, in the US state of Illinois. Des ...

'' 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.

References

External links

Ecology
Malveae Flora of the Northwestern United States Flora of British Columbia Flora of California Flora of Nevada Flora without expected TNC conservation status {{Malveae-stub