Gasteria

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Gasteria
Gasteria batesiana

Gasteria batesiana

Systematics
Class : Bedecktsamer (Magnoliopsida)
Monocots
Order : Asparagales (Asparagales)
Family : Grass trees (Xanthorrhoeaceae)
Subfamily : Affodilla family (Asphodeloideae)
Genre : Gasteria
Scientific name
Gasteria
Duval
Gasteria ser. Gasteria : Bulbous flower of Gasteria bicolor var. Bicolor
Gasteria ser. Gasteria : inflorescence of Gasteria disticha
Gasteria ser. Longifoliae : Gasteria acinacifolia
Gasteria ser. Namaquana : Gasteria pillansii
Gasteria ser. Multifariae : Gasteria nitida

The Gasteria , Germanized they are also called Gasteria , are a genus of plants from the subfamily of the Affodill family (Asphodeloideae). About 22 species belong to the genus . Their natural distribution is limited to the southern and western part of the Republic of South Africa with a species that extends into the border regions to Namibia ( Gasteria pillansii ).

description

Gasteria are evergreen succulent plants. All species grow in two rows when young, about half of the species change to rosette-shaped growth in old age. Most species form many offshoots (Kindel) near the mother plant. Solitary gastritis are rare, as a rule they form dense cushions. The simple, succulent leaves usually have a horny edge, but are never reinforced. The leaf surface is dark green with bands of white dots.

Gasteria form lateral or terminal, sometimes branched, loose inflorescences , mostly they are racemose . The hermaphrodite, zygomorphic flowers are threefold. The bracts are yellowish to red or yellow and often have green tips. The bracts are fused with tubes, but they are not double-lipped, which is a main distinguishing feature from Haworthia species. The flower tube is curved and bulbous, this is the main distinguishing feature to Aloë species (hence the botanical name: from Greek gáster for belly). There are fruit capsules formed.

Systematics

The genus Gasteria was founded in 1809 by Henri Auguste Duval in Pl. Succ. Horto Alencon. , 6 first described. A heterotypical synonym is Ptyas Salisb.

species

The South African Gasteria specialist Ernst van Jaarsveld from the Kirstenbosch Botanical Garden and author of the Gasteria standard work Gasterias of South Africa, A new revision of a major succulent group (Fernwood Press, Vlaeberg 1994) drastically reduced the more than 100 Gasteria names and demonstrated that that many common names such as Gasteria caespitosa , Gasteria maculata , Gasteria marmorata , Gasteria minima or Gasteria prolifera are only location varieties, misdescriptions or culture hybrids .

The genus Gasteria is divided into two sections, each with two series, and includes the following species:

Hybrids

  • × Algastoloba D.M.Cumming
    = Aloe × Gasteria × Astroloba
  • × Bayerara D.M.Cumming
    = Aloe × Gasteria × Haworthia
  • × Cummingara G.D.Rowley
    = Gasteria × Haworthia × Poellnitzia
  • × Gasteraloe Guillaumin
    = Gasteria × Aloe

swell

Individual evidence

  1. ^ Royal Botanic Gardens, Kew: World Checklist of Selected Plant Families.
  2. ↑ Urs Eggli (Ed.): Succulents Lexicon. Monocotyledons . Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7 , pp. 200-206 .
  3. ^ Ernst Jacobus van Jaarsveld: The genus Gasteria: A synoptic review (new taxa and combinations) . In: Aloe . Volume 44, number 4, 2007, p. 98.
  4. ^ Ernst Jacobus van Jaarsveld: The genus Gasteria: A synoptic review (new taxa and combinations) . In: Aloe . Volume 44, number 4, 2007, p. 99.
  5. ^ Ernst Jacobus van Jaarsveld: The genus Gasteria: A synoptic review (new taxa and combinations) . In: Aloe . Volume 44, number 4, 2007, p. 99.
  6. ^ Ernst Jacobus van Jaarsveld, AE Van Wyk: Gasteria doreeniae: a new species from the Eastern Cape . In: Aloe . Volume 41, Number 4, 2004, pp. 81-83.
  7. ^ Ernst Jacobus van Jaarsveld: The genus Gasteria: A synoptic review (new taxa and combinations) . In: Aloe . Volume 44, number 4, 2007, p. 100.
  8. ^ Ernst Jacobus van Jaarsveld: The genus Gasteria: A synoptic review (new taxa and combinations) . In: Aloe . Volume 44, Number 4, 2007, pp. 94-95.
  9. ^ EJ van Jaarsveld: Gasteria barbae, a new cliff-dwelling species from the Western Cape, South Africa . In: CactusWorld . Volume 32, number 4, 2014, pp. 257-260.
  10. ^ Ernst Jacobus van Jaarsveld: Gasteria pendulifolia van Jaarsv., A new species from KwaZulu-Natal . In: Cactus and Succulent Journal . Volume 73, Number 2, Cactus and Succulent Society of America, 2001, pp. 68-70.
  11. ↑ BJM Zonneveld, EJ van Jaarsveld: Taxonomic implications of genome size for all species of the genus Gasteria Duval (Aloaceae) . In: Plant Systematics and Evolution . Volume 251, Number 2-4, 2005, pp. 217-227 ( doi: 10.1007 / s00606-004-0244-x ).
  12. ↑ Neil R. Crouch, Gideon F. Smith, D. Styles: Asphodelaceae: Alooideae. Gasteria croucheri subsp. Pondoensis, a new cremnophyte from Pondoland, South Africa . In: Bothalia . Volume 41, number 1, 2011, pp. 183-185 ( PDF ).
  13. ^ EJ van Jaarsveld: Gasteria loedolffiae (Asphodelaceae). A new cliff-dwelling species from the Eastern Cape, South Africa . In: Bradleya . Volume 32, 2014, pp. 44-49.
  14. ^ EJ van Jaarsveld, AE van Wyk: Gasteria tukhelensis, a new species from Kwazulu-Natal, South Africa . In: Bothalia . Volume 35, Number 2, 2005, pp. 164-166.
  15. ^ Ernst Jacobus van Jaarsveld: Gasteria polita van Jaarsv., A new species from the Western Cape . In: Cactus and Succulent Journal . Volume 73, Number 3, Cactus and Succulent Society of America, 2001, pp. 127-130

Further literature

  • Ernst Jacobus van Jaarsveld: The genus Gasteria: A synoptic review (new taxa and combinations) . In: Aloe . Volume 44, Number 4, 2007, pp. 84-104.
  • Bernardus Joannes Maria Zonneveld, Ernst Jacobus van Jaarsveld: Taxonomic implications of genome size for all species of the genus Gasteria Duval (Aloaceae) . In: Plant Systematics and Evolution . Volume 251, Number 2-4, 2005, pp. 217-227 ( doi: 10.1007 / s00606-004-0244-x ).

Web links

Commons : Gasteria  - collection of images, videos and audio files