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Twisted Cleomella
Cleomella plocasperma

About Twisted Cleomella (Cleomella plocasperma) Cleomella plocasperma is a species of flowering plant in the cleome family known by the common name twisted cleomella and alkali stinkweed. It is native to the Great Basin and Mojave Desert in the western United States, where it grows mainly in wet, alkaline soils such as those around hot springs. There is a disjunct population in the Bruneau Valley of southwestern Idaho. It grows with other halophytic species such as saltgrass and greasewood. This is an annual herb producing a smooth, hairless stem which divides into several erect or upright branches which may exceed half a meter tall. The sparse leaves are each split into three narrow leaflets. The flowers occur in a raceme at the top of each stem branch. Each flower has four yellow petals and several long stamens which may be over a centimeter long. The fruit is a capsule with large lobes. It hangs at the tip of the remaining flower receptacle.
Plant Description
Plant Type
Annual herb

Max. Height
0.33 - 1.6 ft (0.1 - 0.49 m)

Flower Color

Native Status

Natural Setting
Elevation ?
2145' - 6778'

Annual Precip. ?
3.5" - 18.4"

Summer Precip. ?
0.40" - 1.69"

Coldest Month ?
33.7° F - 50.2° F

Hottest Month ?
63.0° F - 80.8° F

Humidity ?
2.52 vpd - 33.39 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Alkali Stinkweed

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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