Dipentodontaceae
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Perrottetia sandwicensis on Maui , fruiting |
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| Systematics | ||||||||||||
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| Dipentodontaceae | ||||||||||||
| Merrill |
The Dipentodontaceae are a family of plants in the small order of the Huerteales .
description
They are deciduous to semi- evergreen trees or shrubs . The alternate leaves are stalked and simple. The leaf margin is sawn. There are stipules present.
On annual twigs stand axillary, composite total inflorescences , which are composed of differently structured partial inflorescences. The small (diameter 1 to 4 mm), radial symmetry flowers are usually five, less often four to seven. In Dipentodon the flowers are hermaphroditic. In Perrottetia the flowers are unisexual and the plants are dioecious, separate sexes ( diocesan ). The flower cup (hypanthium) is short. There are two circles with bracts ; they differ more or less strongly. There is a discus. There is only one circle with mostly five (four to seven) free, fertile stamens . Two or three carpels are a top permanent ovary fused with a stylus.
The stone fruit-like fruits are single-seeded capsule fruits or two- to four- seeded berries . The seeds can have an aril . The endosperm is thin.
Systematics
The Dipentodontaceae are a molecular-genetic defined taxon . Both genera were mostly placed in the Celastraceae family . This family owns a disjoint area .
In the family Dipentodontaceae there are only two genera with about 16 species :
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Dipentodon
Dunn : it is a monotypic genus:
- Dipentodon sinicus Dunn : It is a tree native tosouthern China , Myanmar, and Assam .
- Perrottetia Kunth : With about 18 kinds. This genus has a disjoint area : on the one hand from China to the Malay Archipelago and northeastern Australia , on the other hand from Mexico to Peru and Bolivia, plus Hawaii.
swell
- The family of Dipentodontaceae in APWebsite. (As of end of 2008)
- Jin-shuang Ma & Bruce Bartholomew: Dipentodontaceae in the Flora of China , Volume 11, p. 494: Online. (English)
- Dipentodontaceae, there only one genus in DELTA by L. Watson and MJ Dallwitz.
further reading
- Li-Bing Zhangab, Mark P. Simmonsac: Phylogeny and delimitation of the Celastrales inferred from nuclear and plastid genes. In: Systematic Botany. Vol. 31, No. 1, 2006, ISSN 0363-6445 , pp. 122-137, doi: 10.1600 / 036364406775971778 .
Individual evidence
- ↑ a b Rafaël Govaerts (ed.): Dipentodontaceae. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved September 29, 2018.
