Plantae > Tracheophyta > Magnoliopsida > Fagales > Juglandaceae > Juglans > Juglans major

Juglans major (Arizona walnut; New Mexico walnut; Arizona black walnut)

Synonyms: Juglans elaeopyren; Juglans major var. glabrata; Juglans microcarpa subsp. major; Juglans microcarpa var. major; Juglans rupestris var. major

Wikipedia Abstract

Juglans major (literally, the larger walnut) is a walnut tree which grows to 50 ft tall (15 m) with a DBH of up to 2 feet (0.61 m) at elevations of 1000–7000 ft in Texas, Oklahoma, New Mexico, Arizona, and Utah. It also occurs in Mexico as far south as Guerrero. Common names include Arizona walnut, Arizona black walnut (as it belongs to the "black walnuts" section Juglans sect. Rhysocaryon), and the generic Spanish term for walnuts nogal.
View Wikipedia Record: Juglans major


Height [3]  49 feet (15 m)
Width [1]  43 feet (13 m)
Air Quality Improvement [1]  Low
Allergen Potential [1]  High
Carbon Capture [1]  Medium-Low
Screening - Summer [2]  Moderate
Screening - Winter [2]  Porous
Shade Percentage [1]  91 %
Temperature Reduction [1]  Medium
Wind Reduction [1]  Medium
Hardiness Zone Minimum [1]  USDA Zone: 8 Low Temperature: 10 F° (-12.2 C°) → 20 F° (-6.7 C°)
Hardiness Zone Maximum [1]  USDA Zone: 9 Low Temperature: 20 F° (-6.7 C°) → 30 F° (-1.1 C°)
Light Preference [2]  Full Sun
Soil Acidity [2]  Neutral
Soil Fertility [2]  Intermediate
Water Use [1]  Moderate
Flower Color [2]  Brown
Foliage Color [2]  Yellow
Fruit Color [2]  Brown
Fall Conspicuous [2]  Yes
Fruit Conspicuous [2]  Yes
Bloom Period [2]  Late Spring
Drought Tolerance [2]  Medium
Edible [3]  May be edible. See the Plants For A Future link below for details.
Fire Tolerance [2]  None
Flower Type [3]  Monoecious
Frost Free Days [2]  3 months 15 days
Fruit/Seed Abundance [2]  Medium
Fruit/Seed Begin [2]  Fall
Fruit/Seed End [2]  Winter
Growth Form [2]  Single Stem
Growth Period [2]  Spring, Summer
Growth Rate [2]  Slow
Hazards [2]  Slight Toxicity
Leaf Type [3]  Deciduous
Lifespan [2]  Perennial
Pollinators [3]  Wind
Propagation [2]  Bare Root, Container, Cutting, Seed
Root Depth [2]  3.3 feet (102 cm)
Seed Spread Rate [2]  Slow
Seed Vigor [2]  Medium
Seeds Per [2]  90 / lb (198 / kg)
Shape/Orientation [2]  Erect
Specific Gravity [4]  0.47
Structure [3]  Tree
Usage [3]  This species is sometimes used as a rootstock; A golden brown dye can be obtained from the seed husks; A light brown dye is obtained from the young twigs; Plants produce chemicals which can inhibit the growth of other plants. These chemicals are dissolved out of the leaves when it rains and are washed down to the ground below, reducing the growth of plants under the tree; The roots of many members of this genus produce substances that are toxic to many plant species, especially apples (Malus species), members of the Ericaceae, Potentilla spp and the white pines (certain Pinus spp.); Wood - this very attractive wood rivals that of J. nigra, the black walnut, in quality; However, the limited range and smaller size of the tree have restricted its use;
Vegetative Spread Rate [2]  None
View Plants For A Future Record : Juglans major

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Fort Bowie National Historic Site III 1004 Arizona, United States
Grand Canyon National Park II 1210128 Arizona, United States
Tonto National Monument V 1123 Arizona, United States
Walnut Canyon National Monument V 3386 Arizona, United States


Ammospermophilus interpres (Texas antelope squirrel)[5]
Citheronia splendens (Splendid Royal Moth)[6]
Sciurus arizonensis (Arizona gray squirrel)[7]

Range Map

North America;



Attributes / relations provided by
1i-Tree Species v. 4.0, developed by the USDA Forest Service's Northern Research Station and SUNY-ESF using the Horticopia, Inc. plant database.
2USDA Plants Database, U. S. Department of Agriculture
3Plants For A Future licensed under a Creative Commons License
4Forest Inventory and Analysis DB version 5.1, May 4, 2013, U.S. Forest Service
5Ammospermophilus interpres, Troy L. Best, Cynthia L. Lewis, Katharine Caesar, and Amy S. Titus, MAMMALIAN SPECIES No. 365, pp. 1-6 (1990)
6HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández
7Sciurus arizonensis, Troy L. Best and Suzanne Riedel, MAMMALIAN SPECIES No. 496, pp. 1-5 (1995)
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Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access