 Banksia violacea is one of a small number of Banksia species that has both lignotuberous and non @-@ lignotuberous populations . In both cases , plants are adapted to release their aerial seed bank following a bushfire , ensuring seedlings are established on clear and relatively fertile ground ; however the possession of a lignotuber makes plants much less reliant on fire regime for population maintenance and regeneration , as maternal plants are not killed by bushfire , but resprout from below ground level . Lignotuberous plants generally occur among the north @-@ eastern populations , in the vicinity of Woodanilling . An investigation into the biogeography of these plants failed to find any vegetative , climatic or other environmental factors associated with the possession of a lignotuber . 
 Banksia violacea <a href='drop_aux' title='1'><mark>is</mark></a>one of a small number of Banksia species <a href='null_relcl' title='2'><mark>that</mark></a><a href='got' title='3'><mark>has</mark></a> both lignotuberous and non @-@ lignotuberous populations . In both cases , plants are adapted to release their aerial seed bank following a bushfire , ensuring seedlings are established on clear and relatively fertile ground ; however the possession of a lignotuber <a href='uninflect' title='4'><mark>makes</mark></a> plants much less reliant on fire regime for population maintenance and regeneration , as maternal plants are not killed by bushfire , but resprout from below ground level . Lignotuberous plants generally occur among the north @-@ eastern populations , in the vicinity of Woodanilling . An investigation into the biogeography of these plants failed to find any vegetative , climatic or other environmental factors associated with the possession of a lignotuber . 
Banksia violacea one of a small number of Banksia species got both lignotuberous and non @-@ lignotuberous populations . In both cases , plants are adapted to release their aerial seed bank following a bushfire , ensuring seedlings are established on clear and relatively fertile ground ; however da possession of a lignotuber make plants much less reliant on fire regime fa population maintenance and regeneration , as maternal plants ain't killed by bushfire , but resprout from below ground level . Lignotuberous plants generally occur among the north @-@ eastern populations , in tdavicinity of Woodanilling . An investigation into the biogeography of dese plants failed to find any vegetative , climatic or other environmental factors associated witt the possession of a lignotuber .