Petrobium
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Petrobium arboreum |
Petrobium is a genus in the family Asteraceae endemic to the island of St Helena in the South Atlantic Ocean. The vernacular name is whitewood.
- Species
There is a single species
- Petrobium arboreum R.Br. (St Helena whitewood)
It is found in the tree-fern thicket at the top of the central ridge in St Helena. Individuals are either female or hermaphrodite, i.e. the species is gynodioecious.