Juglans major

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fagales

Familia: Juglandaceae
Subfamilia: Juglandoideae
Genus: Juglans
Species: Juglans major
Name

Juglans major (Torr.) A.Heller,1904
Synonyms

Juglans microcarpa ssp. major (Torr.) A.E.Murray, Kalmia, 12: 21 (1982)
Juglans microcarpa var. major (Torr.) L.D.Benson in L.D.Benson & Darrow, Trees & Shrubs of Southw. Deserts 110 (1954)
Juglans rupestris var. major Torr., Rep. Exped. Zuni & Colorado Rivers 171 (1853)
Juglans elaeopyren Dode, Bull. Herb. Boiss. ser. 2, 7(3): 247 (-248) (1907)
Juglans major var. glabrata Manning

Distribution
Native distribution areas:
Juglans major

Continental: Northern America
Regional: USA
USA (Arizona, New Mexico, Oklahoma, Texas, Utah)
Regional: Mexico
Mexico (Chihuahua, Coahuila, Colima, Durango, Guanajuato, Guerrero, Hidalgo, Jalisco, Mexico State, Michoacan, Morelos, Nayarit, Nuevo Leon, Oaxaca, Queretaro, Sinaloa, Sonora, Tamaulipas, Veracruz)

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Heller, A.A., 1904. Muhlenbergia; a Journal of Botany. Lancaster, PA, and Los Gatos, CA 1:50.

Additional references

Flora of North America Editorial Committee (1997). Flora of North America North of Mexico 3: 1-590. Oxford University Press, New York, Oxford.

Links

Govaerts, R. et al. 2022. Juglans major in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 Mar 02. Reference page.
Hassler, M. 2022. Juglans major. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2022. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2022 Mar 02. Reference page.
Tropicos.org 2022. Juglans major. Missouri Botanical Garden. Published online. Accessed: 02 Mar 2022.
International Plant Names Index. 2022. Juglans major. Published online. Accessed: Mar 02 2022.
USDA, ARS, Germplasm Resources Information Network. Juglans major in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 2022 Mar 02.

Vernacular names
English: Arizona walnut

Juglans major (literally, the larger walnut), also known as Arizona walnut,[1] 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.[4] It also occurs in Mexico as far south as Guerrero.[5] 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).
Description

In moister areas, the tree features a single, stout trunk; there are usually several slender trunks in drier situations.[6] 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.[7][8]

Where the range of J. major overlaps that of J. microcarpa, the two interbreed, producing many intermediate forms.[9][10]
References

Barstow, M.; Stritch, L. (2019). "Juglans major". IUCN Red List of Threatened Species. 2019: e.T66813121A66813150. doi:10.2305/IUCN.UK.2019-1.RLTS.T66813121A66813150.en. Retrieved 19 November 2021.
Tropicos
The Plant List
"USDA Plants Database".
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.