|At Morton Arboretum, Illinois|
|Section:||Juglans sect. Rhysocaryon|
|Natural range of Juglans major|
Juglans major (literally, the larger walnut), also known as Arizona walnut, is a walnut tree which grows to 50 ft tall (15 m) with a DBH of up to 0.61 metres (2 ft) at elevations of 300–2,130 m (1,000–7,000 ft) in Texas, Oklahoma, New Mexico, Arizona, and Utah. It also occurs in Mexico as far south as Guerrero. Common names include Arizona black walnut (as it belongs to the "black walnuts" section Juglans sect. Rhysocaryon), and the Spanish name nogal cimarrón (cimarron walnut).
In moister areas, the tree features a single, stout trunk; there are usually several slender trunks in drier situations. The 8–14 in long pinnately compound leaves bear 9–15 lanceolate leaflets, 19–32 mm (.75–1.25 in) wide by 51–102 mm (2–4 in) long. The small nut has a thick shell with deep grooves enclosing an oily, edible seed.
- Barstow, M. & Stritch, L. (2019). "Juglans major". IUCN Red List of Threatened Species. 2019: e.T66813121A66813150. Retrieved 2 September 2021.
- The Plant List
- Laferriere, J.E. (1993). "Juglandaceae, Walnut Family". Journal of the Arizona-Nevada Academy of Science 27:219.
- Kershner, Mathews, Nelson, and Spellenberg (2008). National Wildlife Federation Field Guide to Trees of North America Inc, New York: Sterling Publishing Co., p. 228.
- Heller, Amos Arthur. (1909). Muhlenbergia; a Journal of Botany 1(4): 50.
- Torrey, John. (1853). Report of an Expedition down to the Zuni and Colorado Rivers 171, pl. 16.
- Vines, Robert A. (1960). Trees, shrubs, and woody vines of the Southwest. Austin, TX: University of Texas Press. 1104 p
- Powell, A. Michael. (1988). Trees & shrubs of Trans-Pecos Texas including Big Bend and Guadalupe Mountains National Parks. Big Bend National Park, TX: Big Bend Natural History Association. 536 p.
Data related to Juglans major at Wikispecies