Casurina, Australian timber. Looks like a pine because it has needle like leaves, but the wood is more like a diffuse porous oak. It is also called she oak. Splits cleanly like oak.
Never tried it for a bow, but Badger one of the most experienced bowyers on here rates it as pretty good from memory.
General theory for bending wood with heat, is if the wood is green, use wet heat, like steaming or boiling. Also use wet heat for tight bends like recurves. If the wood is dry, use a heat gun, for taking out propellor twist, or reflexing, or making the limbs look more even.
