Vascular Plants of the Gila Wilderness

Presented in Association with the
Western New Mexico University Department of Natural Sciences

Alnus oblongifolia Torrey
(Arizona Alder)


Family: Betulaceae

Status: Native

Synonyms:
None

Alnus oblongifolia is usually a streambank tree in the Gila National Forest, although it can also grow as a large shrub. The leaves are simple, doubly serrate and heavy veined. The male flowers are structured in catkins and the female flowers are surrounded by bracts which harden into a woody remnant (called by some an ament, others a strobilus) which resembles a small cone. The young branches can be longitudinally ridged.



Alnus oblongifolia, photo Russ Kleinman, Bill Norris & Mark Donnell, Mogollon Mtns., Bursum Road, Aug. 4, 2007



Alnus oblongifolia, doubly serrate leaf, photo Russ Kleinman, Pinos Altos Range, McMillen Campground, August 29, 2010



Alnus oblongifolia, leaves and woody remnant of pistillate flowers (ament), photo Russ Kleinman, West Fork of the Gila River at Three Mile Ruin, Sept. 27, 2008



Alnus oblongifolia, macro of next year's staminate catkins developing the winter before, photo Russ Kleinman, Black Range, Railroad Canyon, Nov. 19, 2008



Alnus oblongifolia, macro of woody remnant of pistillate flowers, photo Russ Kleinman, Black Range, Railroad Canyon, Nov. 19, 2008



Alnus oblongifolia, closeup of catkin, photo Russ Kleinman, Bill Norris, Scott Zager, Maggie Knox, Leith Young, & Bonnie Arfsten, Gila River at Alum Camp, March 29, 2009



Alnus oblongifolia, winter twig, photo Russ Kleinman, Pinos Altos Range, Hwy 15 between McMillen Campground and Signal Peak turnoff, December 28, 2009



Alnus oblongifolia, winter twig with leaf scar and bud, photo Russ Kleinman, Pinos Altos Range, Hwy 15 between McMillen Campground and Signal Peak turnoff, December 28, 2009



Alnus oblongifolia, longitudinally ridged twig, photo Russ Kleinman & Richard Felger, Pinos Altos Range, Bear Canyon Dam, October 24, 2010


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