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Idahoa scapigera
About Scalepod (Idahoa scapigera) 0 Nurseries Carry This Plant Idahoa is a monotypic genus of plants in the mustard family containing the single species Idahoa scapigera, which is known by the common names scalepod and oldstem idahoa. It is native to western North America from British Columbia to California to Montana where it grows generally in mountains and foothills. This is a petite annual herb growing a basal rosette of petioled leaves each one to three centimeters long and smooth or lobed along the edges. The thin, leafless erect stems rise to a maximum height near ten centimeters. Each bears a single tiny flower with white petals above red-purple sepals. The fruit is a flat, round capsule, shaped like a disc or somewhat oval, and 6 to 12 millimeters wide. The green fruit dries to a papery gray or white.
Plant Description
Plant Type
Plant Type
Annual herb

4 in tall

Flower Color
Flower Color
White, Purple, Red

Landscaping Information
Natural Setting
Annual Precipitation: 14.3" - 61.4", Summer Precipitation: 0.37" - 2.06", Coldest Month: 31.3" - 50.6", Hottest Month: 54.1" - 76.2", Humidity: 0.31" - 26.49", Elevation: 336" - 7174"

Alternative Names
Common Names: Oldstem Idahoa

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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