Peridiscaceae

The Peridiscaceae are a small family of plants within the order of Saxifrage -like ( Saxifragales ). The four genera with about ten species are found in tropical South America and Africa.

Description

There are deciduous trees. The alternate, stalked leaves are large, simple and leathery, with a smooth margin. The stipules are present.

They have grapey or frets celled inflorescences. The small flowers are hermaphroditic and radial symmetry. There are four to seven sepal -like bracts free present which are usually hairy. The many ( 30 to 100 ) of free, fertile stamens centrifugally formed. Three or four carpels are fused into a superior ovaries, with three or four short, more or less free pencils and just as many scars. Are formed drupes.

System

The Peridiscaceae family in 1950 was set up by João Geraldo Kuhlmann in Arquivos do Servico Florestal, 3, p 4. Taxa of this family were formerly in the families of Flacourtiaceae, Passifloraceae, Medusandraceae Brenan nom. cons. or Soyauxiaceae F.A.Barkley nom. nud. or the order Violales classified.

To the family of Peridiscaceae include:

  • Medusandra Brenan: The approximately two species are native to tropical West Africa.
  • Peridiscus Benth. Contains only one type: Peridiscus lucidus Benth. It occurs in Brazil and Venezuela.
  • Soyauxia floribunda Hutch.
  • Soyauxia gabonensis Oliv.
  • Soyauxia grandiflora Gilg & Stapf
  • Soyauxia talbotii Baker f
  • Whittonia guianensis Sandw. It is located in the northeastern South America.

The relationships can by Soltis et al. 2007 are shown in the evolutionary tree below. This is also consistent with the work of Wurdack & Davis 2009, except for the position of Whittonia whose DNA sequences are unknown. Peridiscus and Whittonia are based on their morphological characteristics undoubtedly sister taxa.

Medusandra

Soyauxia

Peridiscus

Whittonia

Swell

  • The Peridiscaceae in APWebsite family. (Sections Description, distribution and systematics)
  • The Peridiscaceae at DELTA family. ( Description section )
  • DE Soltis, JW Clayton, CC Davis, MA Gitzendanner, M. Cheek, V. Savolainen, AM Amorim, PSSoltis: monophyly and relationships of the enigmatic family Peridiscaceae, In: . Taxon, Volume 56, Issue 1, 2007, pp. 65-73. Full-Text PDF.
  • Kenneth J. Wurdack & Charles C. Davis: Malpighiales phylogenetics: Gaining ground on one of the most recalcitrant clades in the angiosperm tree of life, in: American Journal of Botany, Volume 96, Issue 8, 2009, pp. 1551-1570: full-text online.
Broad-leaved tree Ovary (botany)
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