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Streambank Wild Hollyhock
Iliamna rivularis
  
About Streambank Wild Hollyhock (Iliamna rivularis) 1 Nurseries Carry This Plant 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.
Plant Description
Plant Type
Plant Type
Perennial herb

Size
Size
3 - 6 ft tall

Form
Form
Upright

Growth Rate
Growth Rate
Moderate

Flower Color
Flower Color
Red, Pink, Lavender

Flowering Season
Flowering Season
Summer

Landscaping Information
Nurseries
Nurseries

Soil Description
Soil Description
Prefers loamy soils

Natural Setting
Climate
Climate
Annual Precipitation: 110.5" - 110.5", Summer Precipitation: 3.10" - 3.10", Coldest Month: 42.5" - 42.5", Hottest Month: 66.0" - 66.0", Humidity: 2.54" - 15.90", Elevation: 2511" - 2511"


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora


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