Disocactus

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Not to be confused with Discocactus.

Disocactus
Disocactus biformis (Phyllocactus biformis) 1.34.jpg
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Hylocereeae
Genus: Disocactus
Lindl.[1]
Type species

Species

See text.

Disocactus is a genus of epiphytic cacti in the tribe Hylocereeae found in Central America, the Caribbean and northern South America.[1] It should not be confused with Discocactus, which is a different genus.

Species of Disocactus grow in tropical regions either on trees as epiphytes or on rocks as lithophytes. They have two distinct growth habits. Species such as D. phyllanthoides have stems which are round at the base but then become flattened and leaflike.[1]

Many of the cultivated plants known as epiphyllum hybrids or just epiphyllums are derived from crosses between species of Disocactus (rather than Epiphyllum) and other genera in the Hylocereeae.[2]

Taxonomy[]

Synonymy[]

The boundaries of the genera in the tribe Hylocereeae have been subject to considerable change and uncertainty, which is reflected in the number of names which have been used for Disocactus:[1]

  • Bonifazia Standl. & Steyerm.
  • Chiapasia Britton & Rose
  • Heliocereus (A.Berger) Britton & Rose
  • Lobeira Alexander
  • Nopalxochia Britton & Rose
  • Pseudonopalxochia Backeb.
  • Wittia K.Schum.
  • Wittiocactus

Pseudorhipsalis is sometimes included in Disocactus, but it is kept separate by the International Cactaceae Systematics Group.[1] Aporocactus is formerly included in Disocactus, but it should be a genus on its own according to molecular evidence.[3][4]

Species[]

As of March 2021, Plants of the World Online accepted the following species:[5]

Scientific name Distribution Image
Disocactus ackermannii (Haw.) Ralf Bauer Mexico (Veracruz and Oaxaca) 令箭荷花 Disocactus ackermannii (Epiphyllum ackermannii) -江都花卉節 Jiangdu, China- (9204820253).jpg
Disocactus anguliger (Lem.) M.Á.Cruz & S.Arias Mexico Epiphyllum anguliger 2007-10-18 flowering IMG 4642 EDIT.jpg
(Kimnach) Barthlott Honduras, Nicaragua, Mexico
(Lindl.) Lindl. Guatemala, Honduras
Disocactus crenatus (Lindl.) M.Á.Cruz & S.Arias Mexico, Guatemala, Belize, El Salvador, Honduras Epiphyllum crenatum 'Chichicastenango' 2.jpg
(Weing.) Britton & Rose Guatemala
G.D.Rowley Costa Rica
(F.A.C.Weber) M.Á.Cruz & S.Arias Costa Rica to Panama
Véliz, L.Velásquez & R.Puente Mexico (Chiapas)
(Alexander) Barthlott Mexico (Chiapas)
(Alexander) Kimnach & Hutchison Mexico (Oaxaca) Disocactus macranthus.jpg
(Britton & Rose) Linding. Mexico (Chiapas) Disocactus nelsonii 2.jpg
Disocactus phyllanthoides (DC.) Barthlott Mexico (Pueblo, Veracruz-Llave) Nopalxochia-01.JPG
(Standl. & Steyerm.) Kimnach Guatemala
Cerén, J.Menjívar & S.Arias El Salvador
Disocactus speciosus (Cav.) Barthlott Guatemala, Mexico Disocactus speciosus1MTFL.jpg

References[]

  1. ^ Jump up to: a b c d e Anderson, Edward F. (2001), The Cactus Family, Portland, Oregon: Timber Press, ISBN 978-0-88192-498-5, pp. 221–226
  2. ^ Anderson, Edward F. (2001), The Cactus Family, Portland, Oregon: Timber Press, ISBN 978-0-88192-498-5, p. 286
  3. ^ Cruz, Miguel Ángel; Arias, Salvador; Terrazas, Teresa (2016-04-01). "Molecular phylogeny and taxonomy of the genus Disocactus (Cactaceae), based on the DNA sequences of six chloroplast markers". Willdenowia. 46 (1): 145–164. doi:10.3372/wi.46.46112. ISSN 0511-9618. S2CID 87086656.
  4. ^ Korotkova, Nadja; Borsch, Thomas; Arias, Salvador (2017-11-03). "A phylogenetic framework for the Hylocereeae (Cactaceae) and implications for the circumscription of the genera". Phytotaxa. 327 (1): 1–46. doi:10.11646/phytotaxa.327.1.1. ISSN 1179-3163.
  5. ^ "Disocactus Lindl". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-03-07.

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