Adenium

Adenium obesum ( " Desert Rose" )

The Desert Rose ( Adenium ) are a genus of the family of the dogbane family ( Apocynaceae ). The also " Desert Rose" called Adenium obesum type is used as a house plant for a sunny window use; often it is grafted on to oleander.

Description

The desert roses are stem succulent almost - evergreen to evergreen plants; they grow as shrubs and form thickened strains ( caudex ) from. You can reach stature heights of up to 5 meters and trunk diameter of up to 2 meters. Desert Rose species grow slowly and can be several hundred years old. The spirally arranged and clustered at the engine end of standing leaves are leathery, undivided and about 5 to 15 centimeters long.

At terminal inflorescences sit the flowers. The hermaphroditic, slightly zygomorphic flowers are fünfzählig. The five petals are fused Roehrig, they are usually colored pink to red. Are formed follicles. The seeds have flying hair.

Dissemination

The desert roses are native to Africa and Arabia.

They grow preferably in semi-arid climate.

System

The Desert Rose ( Adenium ) are placed in the subfamily of Apocynoideae. Upon further subdivision of the subfamily in the genus the tribe Tribe Wrightieae is assigned. The first description was by the botanist Johann Jacob Roman and Josef August Schultes was published in 1819.

The systematics within the genus was seen very differently. Part four, five or up to 15 species were distinguished in the genus, the species has been partly but also as monotypic with the only kind of Adenium obesum and viewed many subspecies. According to the current list of species to Kew Checklists today following five types are distinguished, where next to the botanical author abbreviation is indicated by the publication year of publication of the first description:

  • Adenium boehmianum Schinz, Ratio bot Association Prov. Brandenburg 30: 259 ( 1888).
  • Adenium multiflorum Klotzsch in WCHPeters, Naturw. Travel Mossambique 6: 279 (1861 ).
  • Adenium obesum ( Forssk. ) Roem. & Schult. - Briefly called " Desert Rose" -, Syst. Veg. 4: 411 ( 1819).
  • Adenium oleifolium Stapf, Bull Misc. Inform Kew 1907, 53 (1907).
  • Adenium swazicum Stapf, Bull Misc. Inform Kew 1907, 53 (1907).

In the opinion of Gordon Douglas Rowley all of the above are types obesum as subspecies to the species of Adenium. The genus Adenium is therefore monotypic. Rowley distinguishes the following subtypes:

  • Adenium obesum subsp. obesum
  • Adenium obesum subsp. boehmianum ( Schinz ) G.D.Rowley
  • Adenium obesum subsp. oleifolium ( Stapf ) G.D.Rowley
  • Adenium obesum subsp. socotranum ( Vierh. ) Lavranos
  • Adenium obesum subsp. somalens ( Balf.f. ) G.D.Rowley
  • Adenium obesum subsp. swazicum ( Stapf ) G.D.Rowley
Gentianales Arabian Peninsula
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