Dichapetalaceae

The Dichapetalaceae are a plant family in the order of Malpighienartigen ( Malpighiales ). It comprises three genera with around 240 species that are nearly pantropical spread.

• 4.1 Notes and references
• 4.2 External links

Description

Vegetative characteristics

The types of Dichapetalaceae family are woody plants: trees, shrubs, subshrubs or vines.

The alternate and spirally arranged leaves are divided into petiole and leaf blade. The simple leaf blade is herbaceous or leathery, margin entire and pinnately. The stomata are paracytisch. The stipules are usually obsolete.

Generative features

The flowers are borne in scheintraubig - zymösen, approximately capitula -shaped or faszikelartigen inflorescences. The inflorescences are axillary on very short Blütenstandschäften or frequently fused with the petiole, rarely even with the midrib of the leaf.

The very small flowers are usually bisexual, rarely unisexual, radial symmetry to slightly zygomorphic and rarely four, mostly fünfzählig double perianth ( perianth ). If the flowers are unisexual then the species are monoecious getrenntgeschlechtig ( monoecious ). The four or five sepals are usually highest fused at their base. The four or five petals are usually grown only at its base and each more or less deeply divided into two parts and can be nailed. A discus is available. It's just a circle with four or five stamens usually present. Mostly, all stamens are fertile; rarely are two of the five stamens transformed into staminodes. Sometimes no stamens are visible. The pollen grains have three apertures and are colporat. The two to four carpels are fused into a top - up from constant, usually two or three, rarely vierkammerigen ovary. In each ovary chamber are two hanging. epitrope, anatrope ovules present in the apical placentation. Usually only a pen, rarely two to four pens are available.

It is formed a single-seeded drupe. The stone fruit is often densely covered with short, erect hairs that give it a shiny, almost golden appearance. The well-developed embryo is straight.

The basic chromosome numbers be n = 10 or 12

Dissemination

The Dichapetalaceae, with the exception of Micronesia and Polynesia, in the lowlands of all tropical areas of both common on the northern and southern hemisphere, Africa and India, they also radiate from subtropical areas.

System

The Dichapetalaceae were erected in 1886 by Henri Ernest Baillon under the name " Dichapetaleae " in Flora Brasiliensis, 12 ( 1), p 365. The eponymous type genus Dichapetalum is already described in 1806 by Louis Marie Aubert Du Petit Thouars. Synonyms for Dichapetalaceae Baill. are: Chailletiaceae R.Br., Hirtellaceae Horan.

The Dichapetalaceae family contains only three genera and about 200 to 240 species:

• Dichapetalum Thouars ( Syn: Chailletia DC, Icacinopsis Roberty, Leucosia Thouars. ): With approximately 170 species. They are often very toxic fluorine acid compounds ( sodium fluoroacetate ).
• Stephanopodium Poepp. With about 40 species.
• Tapura Aubl. ( Syn: Gonypetalum Ule ): With about 30 species.

Swell

• The Dichapetalaceae in APWebsite family. ( Section systematics and description)
• The Dichapetalaceae family at DELTA. ( Description section )
• Ghillean T. Prance: Dichapetalaceae, in: Flora de Colombia, Vol 20, 2001, ISSN 0120-4351