The leaves of Casuarina equisetifolia look like needle, they were originally board leave. However, its appearance, leaves and fruits became pines like species due to some uncertain reasons.

• 木麻黄原为阔叶树，后期出现了异变，树形，叶片，果实都像松树．图中像松针的小枝上可以找到轮状的鳞片叶