Category Archives: Trees

Better Days: Girdled tree

A dead tree stands out on Pu'u Wa'awa'a

This dead tree on the slopes of Pu’u Wa’awa’a did not die of natural causes. The pale strip near the bottom of the trunk is where the tree was girdled.

The tree is, I’m pretty sure, a silk oak. Native to Australia, these trees were introduced to Hawaii around 1880. When in bloom, they present a mass of brilliant orange flowers, but they seed prolifically and also produce an allelopathic substance that inhibits the growth of other plants. Because of this, they can crowd out native plants, of which there are many on Pu’u Wa’awa’a, so trees in areas where they have become too dense or are not wanted, are girdled.

For more information about Pu’u Wa’awa’a and its trails, go to puuwaawaa.org.

Ohia growing in the lava

An ohia tree grows in a lava flow

The ohia flower is the official flower of the Big Island. It’s an appropriate choice for the volcanically active island since the ohia is one of the first plants to get a foothold in lava flows. When the bright red flowers are in bloom they give a splash of color to the otherwise black lava flows.

An ohia flower