Pennantia
| Pennantia | ||||||||||||
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Pennantia corymbosa |
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Pennantiaceae | ||||||||||||
| J. Agardh | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Pennantia | ||||||||||||
| JR Forest. & G.Forst. |
Pennantia is the only genus of the plant family Pennantiaceae within the order of the umbelliferae (Apiales).
description
Vegetative characteristics
Pennantia species are always woody plants, they are shrubs , small trees or, rarely, lianas .
The alternate and spirally arranged leaves on the branches are divided into a petiole and a leaf blade. The leaf blades are simply or rarely lobed. Most of the leaf margins are serrated. Stipules are missing.
Generative characteristics
The inflorescences are structured differently; the flowers can also stand individually in the leaf axils. The flowers are hermaphroditic or unisexual; if they are unisex then the plants are dioecious separately sexed ( diocesan ).
The small, radial symmetry flowers are usually five-fold. The five sepals are mostly fused with tubes and are also preserved on the fruit. The five petals are free or fused. The five fertile stamens are free from each other, but sometimes fused with the petals. Two carpels have become a top permanent ovary grown. There are one or two stamps, no stylus is recognizable, so the scars are sessile.
They form solitary stone fruits .
Sets of chromosomes
The basic chromosome number is x = 25; there is diploidy with a chromosome number of 2n = 50.
Systematics and distribution
The genus Pennantia was established in 1775 by Johann Reinhold Forster and Georg Forster in Characteres Generum Plantarum: ... , 2nd edition, page 133. The generic name Pennantia honors the Welsh naturalist Thomas Pennant (1726–1798). Type species is Pennantia corymbosa J.R. Forst. & G.Forst. The Pennantiaceae family was established in 1858 by Jakob Georg Agardh in Theoria Systematis Plantarum , page 301.
The genus Pennantia used to be part of the Icacinaceae family. The Pennantiaceae family belongs to the order Apiales .
The Pennantia species occur in New Zealand , on Norfolk Island and in northeastern Australia . The Māori people call the species Kaikomako.
There are only four species in the genus Pennantia and thus also in the Pennantiaceae family:
- Pennantia baylisiana (WRBOliv.) GTSBaylis (Syn .: Plectomirtha baylisiana W.RBOliv. ): It is endemic to the Three Kings Islands (New Zealand).
- Pennantia corymbosa J.R. Forest. & G.Forst. : It thrives in the lowland forests of the North and South Islands of New Zealand.
- Pennantia cunninghamii Miers : It occurs only in the Australian states of New South Wales and Queensland .
- Pennantia endlicheri Reiss. : The home is the island of Norfolk .
swell
- The family of Pennantiaceae in APWebsite . (Sections systematics and description)
- The Pennantiaceae family in the New South Wales Flora Online . (Section description)
Individual evidence
- ↑ The family of Pennantiaceae in APWebsite .
- ^ Pennantia at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ a b c Pennantiaceae at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 9, 2019.
- ↑ Lotte Burkhardt: Directory of eponymous plant names. Extended Edition. Botanic Garden and Botanical Museum Berlin, Free University Berlin Berlin 2018. online.
Web links
- Dendrogram.
- Pennantiaceae on the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved May 11, 2014.
- Additional information. (engl.)