Hello, please let us know where this plant is located. If it is outside of the US - what country? If it is inside the US, what state and county? This way it will be easier for us to diagnose the problem and assign the question to the best expert.
Hi... the location is adelaide south australia, Australia
Our service is based in North America and we are generally unable to answer questions about edible landscape plants or how toxic they are. Never eat a plant you are not absolutely sure is safe. If there is a health concern, contact your emergency poison center. Regional plant experts are your best resource to identify this plant. Garden centers, the herbarium, https://www.anbg.gov.au/chah/resources/herbaria/ad.html or local unversity: http://www.agwine.adelaide.edu.au/ are possibilities.