Dasypogonaceae
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| Arecales | ||||||||||||
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| Dasypogonaceae | ||||||||||||
| Dumort. |
The Dasypogonaceae are a family in the order of the palm-like (Arecales) within the monocotyledons (monocotyledons) that occur only in Australia .
features
The plants are relatively xeromorphic . They have a rhizome or grow tree-shaped, and have a pronounced primary growth in thickness . Xylem vessels are only found in the roots. There are two peripheral phloem strands in the leaf vascular bundles .
The leaves are alternate and have pronounced leaf sheaths .
The flowers are threefold. The bracts are dry. Septal nectaries are present. Per carpel there is an upright ovule . The seeds are round with a light yellow seed coat (testa).
Systematics and distribution
The Dasypogonaceae are a monophyletic group. It was set up in 1829 by Barthélemy Charles Joseph Dumortier . Type genus is Dasypogon R.Br.
The Dasypogonaceae are placed among the Commelinids. Their systematic position within the Commelinids was unclear for a long time, which is why they were not assigned to any order for a long time. According to recent molecular genetic studies with a sufficient number of species, however, they are clearly the sister group of the Arecaceae , which is why they were placed in the order of the Arecales by the Angiosperm Phylogeny Group in 2016 .
The Dasypogonaceae family occurs only in the Mediterranean southwest of Australia and in the state of Victoria .
The Dasypogonaceae family contains four genera:
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Baxteria R.Br. ex Hook. with the only kind:
- Baxteria australis R.Br. ex Hook. : It occurs in southwestern Australia.
- Calectasia R.Br. : With 11 species that occur in southwest and southeast Australia.
- Dasypogon R.Br. : With three types. They occur in southwestern Australia.
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Kingia R.Br. with the only kind:
- Kingia australis R.Br. : It occurs in southwestern Australia.
Sources and further information
- The family of dasypogonaceae in APWebsite. (Section description)
Individual evidence
- ↑ a b Craig F. Barrett, William J. Baker, Jason R. Comer, John G. Conran, Sean C. Lahmeyer, James H. Leebens-Mack, Jeff Li, Gwynne S. Lim, Dustin R. Mayfield-Jones, Leticia Perez, Jesus Medina, J. Chris Pires, Cristian Santos, Dennis Wm. Stevenson, Wendy B. Zomlefer, Jerrold I. Davis: Plastid genomes reveal support for deep phylogenetic relationships and extensive rate variation among palms and other commelinid monocots. New Phytologist, Volume 209, 2016, pp 855-870. doi : 10.1111 / nph.13617
- ↑ Data sheet - Dasypogonaceae at Australian Plant Name Index = APNI.
- ↑ Angiosperm Phylogeny Group: An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. In: Botanical Journal of the Linnean Society. Volume 161, No. 2, 2009, ISSN 0024-4074 , pp. 105-121, doi : 10.1111 / j.1095-8339.2009.00996.x .
- ↑ The Angiosperm Phylogeny Group : An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV . Botanical Journal of the Linnean Society, 2016, Volume 181, pp. 1-20. doi : 10.1111 / boj.12385
- ^ Anna Trias-Blasi, William J. Baker, Anna L. Haigh, David A. Simpson, Odile Weber, Paul Wilkin: A genus-level phylogenetic linear sequence of monocots . Taxon, 2015, Volume 64, pp. 552-581. doi : 10.12705 / 643.9
- ↑ a b c d Rafaël Govaerts (Ed.): Dasypogonaceae. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved January 26, 2017.
