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Trichocereinae

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Trichocereinae
Haageocereus pacalaensis of the tribe Trichocereeae.
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cereeae
Subtribe: Trichocereinae
Buxb. (1958)
Type genus
Trichocereus
Genera

See text

Trichocereinae is a subtribe of cactus that are particular to South America.[1] There are 28 recognized genera in this subtribe.

Description

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Arborescent to shrubby, Trichocereinae 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.[2]

Genera

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The composition of the subtribes of the tribe Cereeae varies. The list below is based on genera accepted by Plants of the World Online as of October 2023[3] and placed in subtribe Trichocereinae by Lendel in 2013. Reicheocactus (listed here) was not included in Lendel's analysis, and was described as basal to the subtribe.[1]

Image Genus Living species
Acanthocalycium Backeb. 1936
Arthrocereus A.Berger 1929
Borzicactus Riccob. 1909
Chamaecereus Britton & Rose 1922
Cleistocactus Lem. 1861
Denmoza Britton & Rose 1922
Echinopsis Zucc. 1837
Espostoa Britton & Rose 1920
Haageocereus Backeb. 1933
Harrisia Britton 1908 publ. 1909
Leucostele Backeb. 1953
Lobivia Britton & Rose 1922
Loxanthocereus Backeb. 1937
Matucana Britton & Rose 1922
Mila Britton & Rose 1922
  • Mila caespitosa Britton & Rose
Oreocereus Riccob. 1909
Oroya Britton & Rose 1922
Rauhocereus Backeb. 1956 publ. 1957
Reicheocactus Backeb. 1942
Samaipaticereus Cárdenas 1952
Setiechinopsis Backeb. ex de Haas 1940
Soehrensia Backeb. 1938
Trichocereus (A.Berger) Riccob. 1909
Vatricania Backeb. 1950
Weberbauerocereus Backeb. 1942
Yungasocereus F.Ritter 1980

Intergeneric hybrids

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Naturally occurring hybrids between genera in the subtribe include:

Artificial hybrids include:

References

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  1. ^ a b Lendel, Anita (2013). South American Cacti in time and space: studies on the diversification of the tribe Cereeae, with particular focus on subtribe Trichocereinae (Cactaceae) (Dr. sc. nat. thesis). University of Zurich. doi:10.5167/UZH-93287. Retrieved 2023-10-10.
  2. ^ Anderson, Edward F.; Eggli, Urs (2005). Das grosse Kakteen-Lexikon (in German). Stuttgart (Hohenheim): Ulmer. pp. 58–59. ISBN 3-8001-4573-1.
  3. ^ "Cactaceae Juss". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. Retrieved 2023-10-10.
  4. ^ "× Chamaelobivia Y.Itô". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-10-09.
  5. ^ "× Trichopsis Y.Itô". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-10-10.
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