By Arthur Cronquist
-- "Natural History"
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Stinkweed (Inula graveolens), and the garden plant Rhus toxicodendron,39 which is not yet known to be naturalized in Australia. A large number of Australians are affected chronically by hay fever (allergic rhinitis) and chronically or acutely by asthma (allergic bronchitis) as a result of inhaling allergenic pollen produced mainly in spring by a wide range of alien plants. ), the olives (Olea europaea and O. 39 A few alien plants contain poisonous compounds, which if ingested may lead to serious illness and death.
11, 63–78, 1984. 5. P. , The Vegetation of Norfolk Island National Parks, A report to the Australian National Parks and Wildlife Service, Canberra, 1989. 6. , Exotic plants on Lord Howe Island: distribution in space and time, 1853–1981, J. , 11, 181–208, 1984. 7. E. , Vegetation Survey of Selected Land Units in the Uluru (Ayers Rock–Mt. Olga) National Park, A report to the Australian National Parks and Wildlife Service, Canberra, 1988. 22 Biological Invasions 8. , Kosciusko Alpine Flora, CSIRO/Collins, Melbourne, 1979.
40 In these cases, a mixed diet appears to overcome such drastic negative effects. 40 The alien St. John’s wort (H. perforatum), widespread in southern Australia, contains hypericin, which if ingested in sufficient quantities can cause photosensitization in animals, especially sheep. Because the flowers contain the highest concentrations of hypericin, grazing in pastures dominated by St. 41 Affected animals recover when they no longer ingest St. John’s wort. The equally widespread alien plant Paterson’s curse (E.
An integrated system of classification of flowering plants by Arthur Cronquist