Arizona alder Betulaceae Alnus oblongifolia Torr.   symbol: ALOB2
	Leaf: Alternate, simple, ovate to oblong, V-shaped base, 2 to 3 1/2 inches long, doubly serrate, dark green above, paler with a few scattered hairs below particularly in leaf axils. Flower: Monoecious; males are yellow-green elongated, catkins about 2 to 3 inches long, in hanging clusters; females are very small (1/4 inch) reddish green appearing in early spring. Fruit: Cone-like, woody, 1/2 inch long, green but turning reddish brown when ripe, contains numerous small winged seeds, ripen in early fall and persist through the winter. Twig: Slender, yellow brown with fine fuzz when young; buds are stalked, red and long up to 1/2 inch. Bark: Gray-brown and smooth with numerous short lenticels when young, later developing rectangular, flat narrow plates a bit scaly. Form: An upright medium sized tree with a narrow crown reaching up to 70 feet in height.
	USDA Plants Database Alnus oblongifolia is native to North America. Range may be expanded by planting. See states reporting Arizona alder (opens a new window).