Within the Alnus acuminata article...

subsp. arguta (Schltdl.) Furlow

This subspecies differs from subsp. acuminata in that its leaves are coarser and more deeply toothed. The leaves of the type subspecies are often serrate, while those of subsp. arguta are doubly serrated. Furlow 1979a. Distribution COSTA RICA; EL SALVADOR; GUATEMALA; MEXICO: Chiapas, Chihuahua, Durango, Guanajuato, Guerrero, Hidalgo, Jalisco, México, Michoacán, Morelos, Nayarit, Oaxaca, Puebla, Querétaro, San Luis Potosí, Sinaloa, Sonora, Veracruz; PANAMA. Habitat Stream banks and moist slopes between 1500 and 3700 m asl. USDA Hardiness Zone 9. Illustration NT137.


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