thinleaf alder Betulaceae Alnus incana ssp. tenuifolia (L.) Moench ssp. tenuifolia (Nutt.) Breitung   symbol: ALINT
	Leaf: Alternate, simple, oval, doubly serrated, 2 to 4 inches long, dull dark green above, paler with slight pubescence below, obviously thin. Flower: Monoecious; in small clusters, preformed male catkins are 1/2 to 1 inch long, slender and green; females are much smaller, reddish green, open in early spring. Fruit: Cone-like, 1/2 inch long, brown when ripe, each scale enclosing a very small winged seed, mature in late summer, and persistent. Twig: Moderate, gray-brown to reddish brown, velvety, lighter lenticels, buds stalked, plump and reddish brown. Bark: Smooth gray-green to reddish brown with numerous conspicuous horizontal white to light orange lenticels, becoming scaly on old trees. Form: A thicket-forming suckering shrub or small tree that reaches 25 feet in height, and may reach 40 feet.
	USDAFS Additional Silvics - USDA Plants Database Alnus incana ssp. tenuifolia is native to North America. Range may be expanded by planting. See states reporting thinleaf alder (opens a new window).