''Tetracoccus'' is a plant genus under the family

Picrodendraceae Picrodendraceae is a family of flowering plants, consisting of 80 species in 24 genera.Stephens, P.F. (2001 onwards). Angiosperm Phylogeny Website. Version 9, June 2008. http://www.mobot.org/MOBOT/Research/APweb/ These are subtropical to tropical ...

. Shrubby-spurge is a common name for plants in this genus. They are

dioecious Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproductio ...

, often hairy shrubs. It was first described in 1885 by Charles Christopher Parry. Its name means, from Greek "four seed" (''tetra'' meaning "four" and ''kokkos'', "kernel, grain").

Distribution

The genus is native to the

southwestern United States The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, Ne ...

and northern Mexico, with species in

desert A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About on ...

chaparral Chaparral ( ) is a shrubland plant community and geographical feature found primarily in the U.S. state of California, in southern Oregon, and in the northern portion of the Baja California Peninsula in Mexico. It is shaped by a Mediterranean c ...

habitats.Kew World Checklist of Selected Plant Families
/ref>

Species

Species include: * '' Tetracoccus capensis'' (I.M.Johnst.) Croizat — endemic to

Baja California Sur Baja California Sur (; 'South Lower California'), officially the Free and Sovereign State of Baja California Sur ( es, Estado Libre y Soberano de Baja California Sur), is the least populated state and the 31st admitted state of the 32 federal ent ...

state (México).Tropicos.org: ''Tetracoccus capensis''
/ref> * ''

Tetracoccus dioicus ''Tetracoccus dioicus'', known by the common names red shrubby-spurge and Parry's tetracoccus, is a species of flowering plant. Distribution The shrub native to the states of southwestern California and Baja California (México). In Southern ...

Parry PARRY was an early example of a chatbot, implemented in 1972 by psychiatrist Kenneth Colby. History PARRY was written in 1972 by psychiatrist Kenneth Colby, then at Stanford University. While ELIZA was a tongue-in-cheek simulation of a Rogeria ...

— endemic to the

Peninsular Ranges The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which ...

in northwestern Baja California state (México); and southern California (U.S.) within San Diego, Orange, and

Riverside Riverside may refer to: Places Australia * Riverside, Tasmania, a suburb of Launceston, Tasmania Canada * Riverside (electoral district), in the Yukon * Riverside, Calgary, a neighbourhood in Alberta * Riverside, Manitoba, a former rural m ...

Counties. * ''

Tetracoccus fasciculatus ''Tetracoccus'' may refer to: * ''Tetracoccus'' (bacterium), a genus of the Rhodobacteraceae * ''Tetracoccus'' (plant), a plant genus under the family Picrodendraceae *''Tetracoccus'', a genus of algae in the family Dictyosphaeriaceae, now called ...

'' (

S.Watson Sereno Watson (December 1, 1826 in East Windsor Hill, Connecticut – March 9, 1892 in Cambridge, Massachusetts) was an American botanist. Graduating from Yale in 1847 in Biology, he drifted through various occupations until, in California, he j ...

) Croizat — Mexico (

Chihuahua Chihuahua may refer to: Places *Chihuahua (state), a Mexican state **Chihuahua (dog), a breed of dog named after the state **Chihuahua cheese, a type of cheese originating in the state **Chihuahua City, the capital city of the state **Chihuahua Mun ...

Durango Durango (), officially named Estado Libre y Soberano de Durango ( en, Free and Sovereign State of Durango; Tepehuán: ''Korian''; Nahuatl: ''Tepēhuahcān''), is one of the 31 states which make up the 32 Federal Entities of Mexico, situated in ...

Nuevo León Nuevo León () is a state in the northeast region of Mexico. The state was named after the New Kingdom of León, an administrative territory from the Viceroyalty of New Spain, itself was named after the historic Spanish Kingdom of León. With a ...

, and

Puebla Puebla ( en, colony, settlement), officially Free and Sovereign State of Puebla ( es, Estado Libre y Soberano de Puebla), is one of the 32 states which comprise the Federal Entities of Mexico. It is divided into 217 municipalities and its cap ...

states). * ''

Tetracoccus hallii ''Tetracoccus hallii'' is a species of flowering shrub in the family Picrodendraceae, known by the common names Hall's shrubby-spurge and Hall's tetracoccus. Distribution The plant is native to the Mojave Desert and Sonoran Desert: in southeaste ...

'' Brandegee — Mojave Desert and Sonoran Desert in California, Nevada, and Arizona (U.S.), and Baja California state (México). Sometimes treated as a variety under T. fasciculatus. * '' Tetracoccus ilicifolius'' Coville & Gilman — endemic to

Death Valley National Park Death Valley National Park is an American national park that straddles the California–Nevada border, east of the Sierra Nevada. The park boundaries include Death Valley, the northern section of Panamint Valley, the southern section of Eureka ...

, in the Mojave Desert and eastern Inyo County, California.

References

External links

Picrodendraceae Malpighiales genera Flora of Northeastern Mexico Flora of Northwestern Mexico Flora of the Southwestern United States Taxa named by George Engelmann Taxa named by Charles Christopher Parry Dioecious plants {{Malpighiales-stub

Distribution

Species

See also

References

External links