is it a flowering or a non-flowering plant?
Flowering
Banksia sceptrum
The tall flower spikes, known as inflorescences, arise at the ends of vertical branches over November to January, and can be striking in appearance. 
what is banksia sceptrum? A plant which specie does this plant come under? Banksia
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Banksia sceptrum [SEP] Description
The tall flower spikes, known as inflorescences, arise at the ends of vertical branches over November to January, and can be striking in appearance. They take 6–7 months to develop—longer than other members of the genus. Between high and wide, they are bright yellow and highly prominent. Flower opening (anthesis) takes place over 1–2 weeks, and proceeds up the flower spike. The ageing flowers turn grey and remain on the spike as the woody oval follicles develop. The infructescence—an old spike bearing follicles—is bulky with a diameter. There are up to 50 follicles on each spike, each long, high and wide.