''Euphorbia antisyphilitica'' is a species of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

in the

spurge ''Euphorbia'' is a large and diverse genus of flowering plants, commonly called spurge, in the family Euphorbiaceae. Euphorbias range from tiny annual plants to large and long-lived trees, with perhaps the tallest being '' Euphorbia ampliphyl ...

family

Euphorbiaceae Euphorbiaceae (), the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of Euphorbia, the type genus of the family. Most spurges, such as ''Euphorbia paralias'', ar ...

. It is native to the

Trans-Pecos The Trans-Pecos, as originally defined in 1887 by the Texas geologist Robert T. Hill, is the distinct portion of Texas that lies west of the Pecos River. The term is considered synonymous with Far West Texas, a subdivision of West Texas. The Tran ...

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

and southern

New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...

in the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

as well as Chihuahua,

Coahuila Coahuila, formally Coahuila de Zaragoza, officially the Free and Sovereign State of Coahuila de Zaragoza, is one of the 31 states of Mexico. The largest city and State Capital is the city of Saltillo; the second largest is Torreón and the thi ...

Hidalgo Hidalgo may refer to: People * Hidalgo (nobility), members of the Spanish nobility * Hidalgo (surname) Places Mexico :''Most, if not all, named for Miguel Hidalgo y Costilla (1753–1811)'' * Hidalgo (state), in central Mexico * Hidalgo, Coah ...

, and

Querétaro Querétaro, officially the Free and Sovereign State of Querétaro, is one of the Political divisions of Mexico, 32 federal entities of Mexico. It is divided into Municipalities of Querétaro, 18 municipalities. Its capital city is Querétaro Cit ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

. Common names include candelilla and wax plant, but the latter is more often applied to members of the unrelated genus ''

Hoya Hoya may refer to: Places *Hoya, Germany, a city in Lower Saxony, Germany *County of Hoya, a former state in present Germany *Hōya, Tokyo, now incorporated within Nishi-tokyo, Tokyo, Japan * Hoya, Hpruso, a place in Hpruso Township, Kayah, Myanma ...

''. It is

shrub A shrub or bush is a small to medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple ...

by and has densely clustered, erect, essentially

leaf A leaf (: leaves) is a principal appendage of the plant stem, stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leav ...

less stems that are covered in

wax Waxes are a diverse class of organic compounds that are lipophilic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give lo ...

to prevent

transpiration Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. It is a passive process that requires no energy expense by the plant. Transpiration also cools plants, c ...

Uses

The white sap of ''E. antisyphilitica'' was historically used in Mexico to treat

sexually-transmitted disease A sexually transmitted infection (STI), also referred to as a sexually transmitted disease (STD) and the older term venereal disease (VD), is an infection that is spread by sexual activity, especially vaginal intercourse, anal sex, oral ...

s. Commercial harvesting of

candelilla wax Candelilla wax is a wax derived from the leaves of the small candelilla shrub native to northern Mexico and the southwestern United States, ''Euphorbia antisyphilitica'', from the family ''Euphorbiaceae''. It is yellowish-brown, hard, brittle, a ...

began at the start of the twentieth century, with demand greatly increasing during

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

and II. This industry largely disappeared following the end of World War II due to diminished candelilla populations and the availability of cheaper petroleum-based waxes. Later on however, new uses were found for the wax mainly in the cosmetic and food industries, and it is still being produced in northern Mexico and exported to other countries.

Cultivation

Candelilla is gaining in popularity as a landscape plant in parts of the arid US southwest. It is popular for the following reasons: * Once established, it needs little water other than rainfall in cities such as Phoenix or Tucson, making it good as a median planting. * It can survive in areas that have reflected light. * It grows best in well-drained soils but can tolerate some clay or limestone. * It is visited by butterflies, although not commonly considered a "butterfly plant." * It is cold-tolerant to 15 degrees F. * It appears not to be bothered by pests. * It can be grown in containers.

Conservation

''E. antisyphilitica'' is protected under Appendix II of the

Convention on International Trade in Endangered Species Convention may refer to: * Convention (norm), a custom or tradition, a standard of presentation or conduct ** Treaty, an agreement in international law ** Convention (political norm), uncodified legal or political tradition * Convention (meeting ...

(CITES) meaning CITES permits/certificates are normally required for international export/import of the species (including parts and derivatives).

References

Notes

External links

{{Taxonbar, from=Q143244 antisyphilitica Plants described in 1832 Flora of the Chihuahuan Desert Flora of Chihuahua (state) Flora of Coahuila Flora of Hidalgo (state) Flora of New Mexico Flora of Querétaro Flora of Texas antisyphilitica