Ironwood

An ironwood tree with its cascading foliage
The Common Ironwood (Casuarina equisetifolia) is something of an invasive weed. It has, in my book, two distinguishing features. The first is the creaking noise it makes when the wind blows, which can be an eerie sound at times. The second is its foliage, which, under the right conditions, looks like a cascade of water.

For more information about Ironwoods, go to wildlifeofhawaii.com/flowers/774/casuarina-equisetifolia-common-ironwood/.