Juglans major

Species of tree

Juglans major

At Morton Arboretum, Illinois

Conservation status

Least Concern (IUCN 3.1)[1]

Scientific classification
Kingdom:  | Plantae
Clade:  | Tracheophytes
Clade:  | Angiosperms
Clade:  | Eudicots
Clade:  | Rosids
Order:  | Fagales
Family:  | Juglandaceae
Genus:  | Juglans
Section:  | Juglans sect. Rhysocaryon
Species:  |

J. major

Binomial name
Juglans major

(Torr.) A. Heller

Natural range of Juglans major
Synonyms[2][3]

* Juglans elaeopyren Dode
* Juglans microcarpa subsp. major (Torr.) A.E. Murray
* Juglans microcarpa var. major (Torr.) L.D. Benson
* Juglans rupestris var. major Torr

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[edit]

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[edit]

1. ^ a b 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.
2. ^ Tropicos
3. ^ The Plant List
4. ^ "USDA Plants Database".
5. ^ Laferriere, J.E. (1993). "Juglandaceae, Walnut Family". Journal of the Arizona-Nevada Academy of Science 27:219.
6. ^ Kershner, Mathews, Nelson, and Spellenberg (2008). National Wildlife Federation Field Guide to Trees of North America Inc, New York: Sterling Publishing Co., p. 228.
7. ^ Heller, Amos Arthur. (1909). Muhlenbergia; a Journal of Botany 1(4): 50.
8. ^ Torrey, John. (1853). Report of an Expedition down to the Zuni and Colorado Rivers 171, pl. 16.
9. ^ Vines, Robert A. (1960). Trees, shrubs, and woody vines of the Southwest. Austin, TX: University of Texas Press. 1104 p
10. ^ 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.

## External links[edit]

Data related to Juglans major at Wikispecies

Taxon identifiers

Juglans major|

* Wikidata: Q1711441
* Wikispecies: Juglans major
* CoL: 6NFLW
* EoL: 594768
* EPPO: IUGMA
* FEIS: jugmaj
* FNA: 233500718
* GBIF: 3054359
* GRIN: 100486
* iNaturalist: 143782
* IPNI: 131762-2
* IRMNG: 10200055
* ITIS: 19252
* IUCN: 66813121
* NatureServe: 2.129895
* NCBI: 91217
* Open Tree of Life: 414533
* PfaF: Juglans major
* Plant List: tro-16700004
* PLANTS: JUMA
* POWO: urn:lsid:ipni.org:names:131762-2
* Tropicos: 16700004
* WFO: wfo-0001067436

Juglans rupestris var. major|

* Wikidata: Q95951333
* GBIF: 3054360
* IPNI: 131788-2
* ITIS: 536399
* POWO: urn:lsid:ipni.org:names:131788-2
* WFO: wfo-0001067489