Pladaroxylon
| Pladaroxylon | |
|---|---|
_p407_-_PLATE_44_-_Pladaroxylon_Leucadendron.jpg/1280px-MELLISS(1875)_p407_-_PLATE_44_-_Pladaroxylon_Leucadendron.jpg)
| |
| Pladaroxylon leucadendron[1] | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Subfamily: | Asteroideae |
| Tribe: | Senecioneae |
| Genus: | Pladaroxylon (Endl.) Hook.f. |
| Species: | P. leucadendron
|
| Binomial name | |
| Pladaroxylon leucadendron | |
| Synonyms[3][4] | |
Pladaroxylon is a genus of trees in the tribe Senecioneae within the family Asteraceae.[3][5][6]
The only known species is Pladaroxylon leucadendron, native to the island of St. Helena in the South Atlantic. Common name is he cabbage-tree.[3][7][8]
Description
Pladaroxylon leucadendron is a small tree, only growing to 5 meters in height, with relatively large and cabbage like leaves.[9][10] The trees branch at regular intervals into two equal sized limbs and all the leaves are at the furthest ends of the branches. As typical of the family it has flower heads (capitula) with many flowers crowded together in one structure that resembles a single flower. Each of these flower heads grows together with many others in a cluster called a corymb.[9]
Range and distribution
The species is endemic to the Island of Saint Helena. On the island it was only found on the central ridge from 720 to 800 meters. As of 1998[update] approximately 50 individuals were known to surive in the wild.[11]
See also
References
- ^ 1875 illustration extracted from page 407 of St. Helena: a physical, historical, and topographical description of the island ... The botanical plates from original drawings by Mrs. J. C. Melliss, by MELLISS, John Charles. Original held and digitised by the British Library.
- ^ Lambdon, P.W.; Ellick, S. (2016). "Pladaroxylon leucadendron". IUCN Red List of Threatened Species. 2016: e.T37596A67371569. doi:10.2305/IUCN.UK.2016-1.RLTS.T37596A67371569.en. Retrieved 20 November 2021.
- ^ a b c Hooker, Joseph Dalton. 1970. Hooker's Icones Plantarum 11: pages 42-43 descriptions in Latin, commentary and geographic information in English
- ^ "Pladaroxylon leucadendron (DC.) Hook.f." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-03-24.
- ^ Hooker, Joseph Dalton. 1970. Hooker's Icones Plantarum 11: plate 1055 line drawing of Pladaroxylon leucadendron
- ^ Tropicos, Pladaroxylon Hook. f.
- ^ Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-11-06 at archive.today
- ^ Cronk, Q.C.B. (1995) The endemic Flora of St Helena. Anthony Nelson Ltd., Oswestry.
- ^ a b Bremer, Kåre; Anderberg, Arne A.; Karis, Per Ola; Nordenstam, Bertil; Lundberg, Johannes; Ryding, Olof (1994). Asteraceae : Cladistics & Classification. Portland, Oregon: Timber Press. pp. 507–508. ISBN 978-0-88192-275-2. Retrieved 21 May 2024.
- ^ Carlquist, Sherwin John (1974). Island Biology. New York: Columbia University Press. p. 417. ISBN 978-0-231-03562-0. Retrieved 21 May 2024.
- ^ Oldfield, Sara; Lusty, Charlotte; MacKinven, Amy (1998). The World List of Threatened Trees. Cambridge, United Kingdom: World Conservation Press. p. 432. ISBN 978-1-899628-10-0. Retrieved 21 May 2024.
External links
Media related to Pladaroxylon at Wikimedia Commons
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