Euphronia

Euphronia is the only plant genus of the family of Euphroniaceae within the order of Malpighienartigen ( Malpighiales ).

Dissemination

All Euphronia species are endemic to the Guiana Shield ( Steyermark & Marcano - Berti 1999).

Description

The Euphronia species are evergreen trees. The alternate and spirally arranged leaves are simple with hairy underside. The leaf margins are rolled. The base of the stipules is white tomentose.

The flowers are borne in terminal paniculate inflorescences. The hermaphrodite flowers are zygomorphic with double perianth. It is a short flower cup ( hypanthium ) available. The five unequal sepals are fused only at their base. The three petals are free. There are two opposing, unequal length couples of fertile stamens present; and there is also a long Staminodium and one to five short, tooth-like staminodes. The stamens are fused into a short tube and the petals. The three carpels are fused to a syncarp, superior ovaries.

The fruit capsules containing winged seeds.

System

Synonyms of Euphronia Mart. & Zucc. are: Lightia R.H.Schomb. and Lightiodendron Rauschert.

The genus Euphronia was previously incorporated into the family of Vochysiaceae A.St. - Hil. , Which belongs to the order Myrtales. The Euphroniaceae family was not published until 1989 by Luis Marcano - Berti and confirmed by molecular genetic studies of Litt & Chase 1999. The Euphroniaceae family is the family of Trigoniaceae, Dichapetalaceae, Balanopaceae and particularly Chrysobalanaceae R.Br. close.

In the genus Euphronia and thus in the family of Euphroniaceae only one or three types are included:

  • Euphronia acuminatissima Steyerm.
  • Euphronia guianensis ( R.H.Schomb. ) H.Hallier
  • Euphronia hirtelloides Mart. ( Syn: . Euphronia licanioides ( Spruce ex Warm ) Hallier f, Lightia licanioides Spruce ex hot. )

Swell

  • The Euphroniaceae in APWebsite family. (English )
  • JA Steyermark & L. Marcano - Berti: Euphroniaceae, In: JA Steyermark, PE Berry, K. Yatskievich, & BK Holst: Flora of the Venezuelan Guayana 5: Eriocaulaceae - Lentibulariaceae, Missouri Botanical Garden Press, St. Louis, 1999..
  • Amy Litt: Vochysiaceae and Euphroniaceae in N. Smith, SA Mori, A. Henderson, DW Stevenson & S. Heald: Flowering Plants of the Neotropics, Princeton University Press, Princeton, 2004.
  • Amy Litt & Chase MW: The systematic position of Euphronia, with comments on the position of Balanops: an analysis based on rbcL sequence data. in Systematic Botany 23, 1999: pp. 401-409.
Rosids Joseph Gerhard Zuccarini Ovary (botany)
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