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Iodine Bush
Allenrolfea occidentalis

About Iodine Bush (Allenrolfea occidentalis) Allenrolfea is a monotypic plant genus containing the single species Allenrolfea occidentalis, the iodinebush. This is a low-lying shrub of the southwestern United States and northern Mexico, where it grows in sandy, often salty, distinctly alkaline soils, such as desert washes and saline dry lakebeds. It is a common member of the alkali flat ecosystem. The knobby green stems are fleshy and appear jointed at the internodes between segments. Often the segments are so short they are nearly round. The leaves appear as flaky scales scattered across the surface of the stems. The genus was named for the English botanist Robert Allen Rolfe. The seeds of iodinebush have been used as food in North America in prehistory.
Plant Description
Plant Type

Max. Height
1 - 7 ft (0.3 - 2.1 m)

Native Status

Natural Setting
Site Type
Saline flats, bluffs


Elevation ?
-280' - 5442'

Annual Precip. ?
1.9" - 29.3"

Summer Precip. ?
0.12" - 1.34"

Coldest Month ?
38.5° F - 61.4° F

Hottest Month ?
67.0° F - 91.1° F

Humidity ?
1.29 vpd - 50.09 vpd

Landscaping Information
Common uses

Nursery Availability
Never or Almost Never Available

Other Names
Common Names

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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