Juglans major

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.

[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).

The small nut has a thick shell with deep grooves enclosing an oily, edible seed.

Where the range of J. major overlaps that of J. microcarpa, the two interbreed, producing many intermediate forms.

Arizona Walnut (Juglans major) nut and hulls
Arizona Walnut (Juglans major) nut cracked open showing nutmeat