These Australian wildflowers and popular garden plants are easily recognised by their characteristic flower spikes and fruiting `` cones '' and heads . When it comes to size , banksias range from prostrate woody shrubs to trees up to 30 metres tall .
As Australian wildflowers and popular garden plants , they are easily recognised by their characteristic flower spikes and fruiting `` cones '' and can vary from woody shrubs to trees up to 30 metres tall .