Tetracarpaea tasmannica
| Tetracarpaea tasmannica | ||||||||||||
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Inflorescence of Tetracarpaea tasmannica |
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Tetracarpaeaceae | ||||||||||||
| ( Engl. ) Nakai | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Tetracarpaea | ||||||||||||
| Hook. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Tetracarpaea tasmannica | ||||||||||||
| Hook. |
Tetracarpaea tasmannica is the only species of plant inthe Tetracarpaeaceae family . This species is endemic to Tasmania .
description
Tetracarpaea tasmannica is a mesophytic , evergreen, upright but low, bushy shrub . The trunk is slender and made of solid wood, it is richly branched ( Leptocaulie ). The nodes are unilacunar with a strand of leaf traces. The stem axis lacks an internal phloem .
The opposite, stalked leaves have a leathery surface. The leaf blade has a feather-shaped vein and the leaf edge is toothed.
The erect, paniculate inflorescences arise from the axils of the bracts . The hermaphroditic, small flowers are four-digit. They have a markedly from the chalice different crown . The sepals are not overgrown, and the white petals are free. Each flower contains eight stamens and four carpels . The filaments are not grown together. Each carpel contains between 15 and 100 ovules .
After flowering, a follicle with very small winged seeds is formed.
distribution
Tetracarpaea tasmannica is endemic, the species is only found in Tasmania . There the species grows in moderately moist habitats.
Systematics
The Tetracarpaceae are closely related to the thousand-leaf family (Haloragaceae), the Penthoraceae , Aphanopetalaceae and the thick-leaf family (Crassulaceae). The relationships are shown in the following cladogram :
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literature
- Klaus Kubitzki: Tetracarpaeaceae . In: Klaus Kubitzki (Ed.): The Families and Genera of Vascular Plants . tape 9 . Springer, Berlin, Heidelberg 2007, ISBN 978-3-540-32214-6 , pp. 456-457 , doi : 10.1007 / 978-3-540-32219-1_52 .
Web links
- L. Watson, MJ Dallwitz: Tetracarpaeaceae (Engl.) Nak. In: The families of flowering plants: descriptions, illustrations, identification, and information retrieval . ( delta-intkey.com [accessed September 20, 2007]).
- PF Stevens: Tetracarpaeaceae . In: Angiosperm Phylogeny Website . ( mobot.org [accessed September 20, 2007]).