This evolutionary breakthrough appears to have opened a floodgate: previously inhospitable areas, such as dry mountain slopes, could now be tolerated, and were soon covered by trees.
Dette gennembrud i planternes udvikling ser ud til at have åbnet et jordskred: tidligere ugæstmilde områder, som f.eks. tørre bjergsider, kunne nu tåles så godt, at de blev dækket af træer.