Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Eremothera boothii, Woody Bottle-Washer

Woody Bottle-washer has attractive white flowers often with red on nodding flowering stalks. Plants bloom from February to August across its large range and multiple sub-species. Eremothera boothii Woody Bottle-washer is a highly variable primrose that is found in the far western United States. It is an annual native species that grows up to 16 inches or so. Eremothera boothii Woody Bottle-washer has attractive basal leaves; green in color with mottled darker blotches gives the plants a dramatic appearance. The leaves may be narrowly elliptic to narrowly ovate. Eremothera boothii Woody Bottle-washer is also called Booth’s Evening-primrose or Booth’s Suncup. This species prefers a wide-range of habitats from low desert to pinyon juniper woodlands. Eremothera boothii

Scientific Name: Eremothera (Camissonia) boothii
Common Name: Woody Bottle-washer
Also Called: Booth Evening Primrose, Booth's Evening-primrose, Booth's Suncup
Family: Onagraceae, Evening Primrose Family
Synonyms: (Camissonia boothii, Oenothera boothii)
Status: Native
Duration: Annual
Size: Up to 16 inches more or less.
Growth Form: Forb/herb; plants mostly plus or minus red; plants highly variable across its range; rosette generally well developed; pubescence minutely strigose, some glandular; stems erect
Leaves: Green, with dark green spots or blotches; highly variable across its range; shape narrowly elliptic or narrowly ovate.
Flower Color: White with some red; nodding flowering stalks; cylindric fruits.
Flowering Season: February August.
Elevation: 200 to 7,500 feet.

Habitat Preferences: Habitat preferences highly variable; sandy flats, washes, steep loose slopes, desert-scrub, Creosote Bush communities, Sagebrush communities, Joshua-tree and pinyon/juniper woodland communities.

Recorded Range: Woody Bottle-washer is found in the far western United States in AZ, CA, ID, NV, OR, UT, WA.

North America & US County Distribution Map for Eremothera boothii.

U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Wetland Indicator: No information available.
Threatened/Endangered Information: No information available.

Genus Information: In North America SEINet lists 7 species for Eremothera. Worldwide, The Plant List includes 7 accepted species names and a further 29 of infraspecific rank for the genus.

Using SEINet species list for Eremothera in the Southwestern United States: Arizona has 3 species of Eremothera, California has 4 species, Nevada has 5 species, New Mexico has 2 species, Texas has 1 species, Utah has 5 species. All data is approximate and subject to taxonomic changes.

There are 6 sub-species in Camissonia boothii (=Eremothera boothii):
Camissonia boothii ssp. alyssoides; Alyssum Evening Primrose, (AZ, CA, ID, NV, OR, UT);
Camissonia boothii ssp. boothii; Booth's Suncup, (AZ, CA, ID, NV, OR, UT);
Camissonia boothii ssp. condensata; Shredding Suncup, (AZ, CA, ID, NV, OR, UT);
Camissonia boothii ssp. decorticans; Shredding Suncup, (AZ, CA, NV, UT);
Camissonia boothii ssp. desertorum ; Desert Suncup, (AZ, CA);
Camissonia boothii ssp. intermedia; Booth's Evening Primrose, (CA, NV).

Comments: Eremothera boothii has 6 sub-species making it highly variable across its large western United States range.

Date Profile Completed: 04/15/2017, updated format 09/28/2017
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California as Oenothera boothii.
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - States List for Camissonia (accessed 04/15/2017)
The Plant List (2013). Version 1.1. Published on the Internet; (accessed 04/15/2017).
Warren L. Wagner & Peter C. Hoch, family description, key to genera, treatment of genera by Warren L. Wagner 2017. Eremothera boothii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 16, 2017.
SEINet synonyms, scientific names, geographic locations, general information - (accessed 04/15/2017).