Austrian pine Pinaceae Pinus nigra Arnold   symbol: PINI
	Leaf: Evergreen needles, 4 to 6 inches long, flexible with two thick, dark green needles per fascicle. Flower: Monoecious; males cylindrical, yellow, in large clusters along twigs; females oval, yellow to purple. Fruit: Cones are ovoid, 2 to 3 inches long, yellow-brown; umbo is armed with a very short, minute prickle, maturing in the fall. Twig: Quite stout, brown to gray in color with a large white, ovoid terminal bud. Bark: Brown to gray, developing gray-brown ridges and dark brown furrows. Form: A medium sized tree reaching up to 100 feet tall with a very dense crown (needles retained up to 4 years) that eventually develops a flat top.
	USDAFS Silvics of North America - USDAFS Additional Silvics - USDA Plants Database Pinus nigra is planted in the highlighted USDA hardiness zones to the left and may seed into the landscape. See a map of the states in which Austrian pine has escaped (opens a new window).