Juglans cinerea


Syst. Nat. ed. 10, 1272. 1759.

Common names: Butternut white walnut noyer cendré
Conservation concernEndemicIllustrated
Synonyms: Wallia cinerea (Linnaeus) Alefeld
Treatment appears in FNA Volume 3.

Trees, to 20(-30) m. Bark light gray or gray-brown, shallowly divided into smooth or scaly plates. Twigs with distal edge of leaf scar straight or nearly so, bordered by well-defined, tan-gray, velvety ridge; pith dark brown. Terminal buds conic, flattened, 12-18 mm. Leaves 30-60 cm; petiole 3.5-12 cm. Leaflets (7-)11-17, ovate to lanceolate or oblong-lanceolate, ± symmetric, (2.5-)5-11(-17.5) × 1.5-6.5 cm, margins serrate, apex acuminate; surfaces abaxially with abundant 4-8-rayed fasciculate hairs, scales, and sometimes capitate-glandular hairs, axils of proximal veins with prominent tufts of fasciculate hairs, adaxially with scattered fasciculate hairs or becoming glabrescent; terminal leaflet present, usually large. Staminate catkins 6-14 cm; stamens 7-15 per flower; pollen sacs 0.8-1.2 mm. Fruits 3-5, ellipsoid to ovoid or cylindric, 4-8 cm, smooth, with dense capitate-glandular hairs; nuts ellipsoid to subcylindric or ovoid, 3-6 cm, surface with ca. 8 high, narrow, longitudinal main ridges, with narrow, interrupted, longitudinal ridges or lamellae between main ridges.

Phenology: Flowering spring (Apr–Jun).
Habitat: Rich woods of river terraces and valleys, also dry rocky slopes
Elevation: 0-1000 m


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N.B., Ont., Que., Ala., Ark., Conn., Del., Ga., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.


Of conservation concern.

The butternut canker is killing Juglans cinerea across its range. Because the trees do not root-sprout, the range is contracting.

Selected References


Lower Taxa

... more about "Juglans cinerea"
Alan T. Whittemore +  and Donald E. Stone +
Linnaeus +
Butternut +, white walnut +  and noyer cendré +
N.B. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
0-1000 m +
Rich woods of river terraces and valleys, also dry rocky slopes +
Flowering spring (Apr–Jun). +
Syst. Nat. ed. +
Conservation concern +, Endemic +  and Illustrated +
Wallia cinerea +
Juglans cinerea +
species +