Also spelled beach sheoak, and called 🐎︎ horsetail casuarina, whistling tree, Filao tree and agoho.

Despite a common name, not an oak  genus Quercus.

Despite another common name, not a 🌲︎ pine  genus Pinus, either.  Not even a 🌲︎ conifer  order Pinales.   But on first look, its leaves looks like it could be.  It's even evergreen!

Part of she-oak  family Casuarinaceae in [bizarrely] bayberry / beech / birch / oak / she-oak / walnut  order Fagales (yes, these beech trees are spelled and derived differently than this tree's common name beach).  Note that this order Fagales, down a different path, does include beech / oak  family Fagaceae and its oak  genus Quercus.

Native to southern Asia, Oceania, and 🇦🇺 Australia.   🗺 Map by county (🇺🇸 USA-48) (color key).   Invasive > 🌐︎ global Invasive > 🌐︎ various Invasive > 🇺🇸 USA

Uses by native peoples
(Ethnobotany database)

🇦🇺 Australian pine produces an allelopathic chemical that suppresses 🌱︎ ger­mi­na­tion of plants not already adapted to this attack.

Learn more about 🇦🇺 Australian pine or beach she-oak Casuarina equisetifolia

🔍︎ 🔍︎ images Discover Life Encyclopedia of Life Flora of North America NRCS PLANTS db USFS Wikipedia