Aextoxicon punctatum
Aextoxicon punctatum | ||||||||||||
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Aextoxicon punctatum |
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Systematics | ||||||||||||
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Scientific name of the family | ||||||||||||
Aextoxicaceae | ||||||||||||
Engler & Gilg | ||||||||||||
Scientific name of the genus | ||||||||||||
Aextoxicon | ||||||||||||
Ruiz & Pav. | ||||||||||||
Scientific name of the species | ||||||||||||
Aextoxicon punctatum | ||||||||||||
Ruiz & Pav. |
Aextoxicon is the only species of the monotypic genus Aextoxicon , the only genus of the family of Aextoxicaceae within the small order of berberidopsidales . In Chile this species is called Olivillo, Tique, Teque, Palo muerto or Aceitunillo.
Occurrence
This common species is only found in central and southern Chile in regions IV to X. There it grows in the coastal cordillera in the Valdivian rainforest (Tique forest) and in the sub-Antarctic forest. It is the most important tree species in the Tique forest.
description
Aextoxicon punctatum is a large evergreen tree that reaches heights of growth of 15 to 20 meters and a trunk diameter of around 0.80 meters. The 0.5 to 1.5 cm long stalked leaves , arranged alternately to opposite on the branches, are simple. The leaf blade is 5 to 9 long and 2 to 4 cm wide. The leaf margins are smooth. Stipules are missing.
The species is dioecious separately sexed ( diocesan ). The racemose inflorescences are in leaf axils, whereby the female inflorescences are much shorter than the male. The unisexual, radial symmetry flowers are five-fold and have a double perianth . There are five free sepals . The five free, whitish petals are nailed. There is a discus. In the male flowers there are five free, fertile stamens and five staminodes . The female flowers contain staminodes and the two carpels are fused into an upper pistil with a stylus and two stigmas .
The drupes are 1 to 1.2 cm long and 0.6 to 0.7 cm wide; they look similar to olives, hence one of the common Spanish names Olivillo.
The number of chromosomes is 2n = 32.
Systematics
This species used to belong to the Euphorbiaceae family or the Aextoxicaceae family to the Celastrales.
In the family of the Aextoxicaceae there is only one monotypical genus , Aextoxicon Ruiz & Pav. , With the only species Aextoxicon punctatum Ruiz & Pav .
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- The family of Aextoxicaceae in APWebsite (English)
- The Aextoxicaceae family at DELTA by L. Watson & MJ Dallwitz
- Entry in the Flora Chilena. (Spanish)
Individual evidence
- ^ Aextoxicon punctatum at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
Web links
- Entry at chileflora. (German)
- Aextoxicon punctatum Description, pictures and distribution map at Chilebosque. (Spanish)
- Aextoxicon punctatum inthe IUCN 2013 Red List of Threatened Species . Listed by: Prado, D., 1998. Retrieved September 3, 2013.