Over the last week or so, some trees in my garden have started to produce lots of orangy yellow comb like flowers. They look pretty spectacular and I was curious about what type of tree they are. Well thanks to the magic of google, the search string "tree yellow comb like flowers" eventually lead me to pictures of the same variety of tree. They are silky oak trees (grevillea robusta). I have four of them, two along the front fence line and two along the back fence line.
Here is a shot of one of them in the front garden:
One of the sites I found says that these trees can grow to 35 meters in the wild, but usually only get to about 14 meters in suburbia. I sincerely hope these ones keep to the lower estimate, 35 meters is a bit high for a tree in a backyard!