Trichocereeae is a
tribe
The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide usage of the term in English is in the discipline of anthropology. This definition is contested, in part due to confli ...
of
cactus
A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Gree ...
that are particular to
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...
. There are 25 recognized genera in this tribe.
Description
Arborescent to shrubby, Trichocereeae normally form unsegmented, spherical to columnar stems that are usually ribbed, tuberculate, or ribbed-warty.
The small to fairly large, regular or bilaterally symmetrical flowers appear laterally or below the apex and open day or night. The flower cup is scaled or covered with hair.
The fruits are fleshy to berry-like and sometimes burst open lengthwise. They contain small to medium-sized seeds that vary in shape. Hilum and micropyle of seeds are fused to united. Appendages are usually absent. A strophic is present in some.
Genera
*''
Acanthocalycium''
*''
Arthrocereus''
*''
Brachycereus''
*''
Cleistocactus''
*''
Denmoza
''Denmoza'' is a genus of cactus found in Argentina, comprising only 2 species. The name of the genus is an anagram of the western province of Mendoza. These species grow slowly and stay globulous during a long period before becoming shortly c ...
''
*''
Discocactus
''Discocactus'' is a genus of Tropics, tropical cactus, cacti. The name comes from the ancient Greek ' (=disc) because of its shape. ''Discocactus'' plants are endemic to southern Brazil, eastern Bolivia, and northern Paraguay. These species ar ...
''
*''
Echinopsis
''Echinopsis'' is a large genus of cacti native to South America, sometimes known as hedgehog cactus, sea-urchin cactus or Easter lily cactus. One small species, ''E. chamaecereus'', is known as the peanut cactus. The 128 species range from l ...
''
*''
Espostoa''
*''
Espostoopsis''
*''
Facheiroa''
*''
Gymnocalycium
''Gymnocalycium'', commonly called chin cactus, is a genus of about 70 South American species of cactus. The genus name ''Gymnocalycium'' (from Greek, "naked calyx") refers to the flower buds bearing no hair or spines.
Their main area of distrib ...
''
*''
Haageocereus''
*''
Harrisia''
*''
Leocereus''
*''
Matucana
''Matucana'' is a genus of cacti (family Cactaceae), containing approximately 20 species of mostly globular plants. The genus is only known from Peru, mostly along the Marañón River.
The first species was discovered near the town of Matuca ...
''
*''
Mila''
*''
Oreocereus''
*''
Oroya
''Oroya'' is a genus of cacti (family Cactaceae), originating from Peru.
The name comes from the Peruvian town of la Oroya
La Oroya is a city on the River Mantaro in central Peru. It is situated on the Andes some 176 km east-north-e ...
''
*''
Pygmaeocereus''
*''
Rauhocereus''
*''
Rebutia
''Rebutia'' is a genus of flowering plants in the family Cactaceae, native to Bolivia and Argentina. They are generally small, colorful cacti, globular in form, which freely produce flowers that are relatively large in relation to the body. They ...
''
*''
Samaipaticereus''
*''
Soehrensia
''Soehrensia'' is a large genus of cacti native to South America.
It is found in Peru, Bolivia, Chile, Paraguay and northern Argentina. Taxonomy
The genus was circumscribed by Curt Backeberg in Blätt. Kakteenf. vol.5 (6) on page 7 in 1938.
Th ...
''
*''
Vatricania''
*''
Weberbauerocereus''
*''
Yungasocereus''
Hybrids
*
× ''Haagespostoa'' ''Haageocereus'' × ''Espostoa''
References
External links
* USDA, ARS, National Genetic Resources Program
Germplasm Resources Information Network - (GRIN) National Germplasm Resources Laboratory, Beltsville, Maryland, June 1, 2007.
Cacti of South America
Caryophyllales tribes
{{Cactus-stub