Juglans major var. major

Common names: Arizona walnut nogal nogal silvestre
Treatment appears in FNA Volume 3.

Trees, 5-18 m. Bark light to medium gray or brownish, divided into narrow checkered plates. Twigs with distal edge of leaf scar notched, glabrous or bordered by poorly defined velvety zone; pith brown. Terminal buds narrowly ovoid or conic, flattened, 4-7 mm. Leaves 18-38 cm; petiole 3-6 cm. Leaflets 9-15, lanceolate to lance-ovate, symmetric or falcate, 6.5-10.5 × 1.5-3.4 cm, margins serrate, apex narrowly acuminate; surfaces abaxially with capitate-glandular hairs, simple or 2-4-rayed fasciculate hairs, and often scales scattered over veins and blade, axils of proximal veins with prominent tufts of fasciculate hairs, adaxially with capitate-glandular hairs, sometimes also scattered fasciculate hairs, becoming glabrate except along major veins; terminal leaflet usually small or none. Staminate catkins 5-8 cm; stamens 20-40 per flower; pollen sacs 1.2-1.4 mm. Fruits 1-3, subglobose or short-ovoid, 2-3.5 cm, smooth, densely covered with capitate-glandular hairs and peltate scales, when very immature also fasciculate hairs; nuts globose to ovoid, 1.8-2.7 cm, deeply longitudinally grooved, surfaces between grooves smooth.

Phenology: Flowering spring (Apr–May).
Habitat: Along streams and rocky canyon sides
Elevation: 300-2100 m


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Ariz., N.Mex., Okla., Tex., Mexico (Chihuahua, Durango, Sinaloa, and Sonora).


Specimens intermediate between Juglans major and both J. microcarpa and J. nigra are discussed under the latter species.

Selected References


Lower Taxa

... more about "Juglans major var. major"
Alan T. Whittemore +  and Donald E. Stone +
(Torrey) A. Heller +
Juglans rupestris var. (ß) +
Arizona walnut +, nogal +  and nogal silvestre +
Ariz. +, N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua +, Durango +, Sinaloa +  and and Sonora). +
300-2100 m +
Along streams and rocky canyon sides +
Flowering spring (Apr–May). +
Muhlenbergia +
Illustrated +
Juglans microcarpa var. major +
Juglans major var. major +
Juglans major +
variety +