which specie does this plant come under?
Banksia
Banksia sceptrum
The species name "sceptrum" "sceptre" refers to the prominent flower spikes. In his 1856 arrangement of the genus, there were 58 described "Banksia" species. 
what is banksia sceptrum? A plant
wiki:4407406
Banksia sceptrum [SEP] Taxonomy
Swiss botanist Carl Meissner described "Banksia sceptrum" in 1855, based on a specimen collected by James Drummond north of the Hutt River sometime during 1850 or 1851. The species name "sceptrum" "sceptre" refers to the prominent flower spikes. In his 1856 arrangement of the genus, there were 58 described "Banksia" species. Meissner divided Brown's "Banksia verae", which had been renamed "Eubanksia" by Stephan Endlicher in 1847, into four series based on leaf properties. He placed "B. sceptrum" in the series "Quercinae". George Bentham published a thorough revision of "Banksia" in his landmark publication "Flora Australiensis" in 1870. In Bentham's arrangement, the number of recognised "Banksia" species was reduced from 60 to 46.