Complex sentence: A pyrophyte is a woody plant which has unusual resistance to fire e.g. because of exceptionally thick bark, or a competitive advantage over other plants following a fire e.g. because fire acts as a catalyst to fertile culm production, or root-sprouts.
Split into simpler sentences: A pyrophyte is a woody plant which has unusual resistance to fire. For instance: because of exceptionally thick bark, or a competitive advantage over other plants following a fire e.g. because fire acts as a catalyst to fertile culm production, or root-sprouts.