Flowering precocious , rarely coetaneous or serotinous .

花先有花，很少花叶同放或。

Flowering coetaneous or slightly serotinous ; catkin long pedunculate , with 2-5 leaflets .

花花叶同放或稍先叶后花；柔荑花序长花序梗，具小叶。

Serotinous cones would prove to be almost fatal for the population if forest fires ceased for any length of time .

若森林火灾中断任意长的一个时期，那么对种群来说，迟裂球果几乎是毁灭性的。