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


V3 908-distribution-map.gif

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


Facts about "Juglans cinerea"
AuthorAlan T. Whittemore + and Donald E. Stone +
AuthorityLinnaeus +
Common nameButternut +, white walnut + and noyer cendré +
DistributionN.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. +
Elevation0-1000 m +
HabitatRich woods of river terraces and valleys, also dry rocky slopes +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
PhenologyFlowering spring (Apr–Jun). +
Publication titleSyst. Nat. ed. +
Publication year1759 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V3/V3 908.xml +
Special statusConservation concern +, Endemic + and Illustrated +
SynonymsWallia cinerea +
Taxon familyJuglandaceae +
Taxon nameJuglans cinerea +
Taxon parentJuglans +
Taxon rankspecies +
VolumeVolume 3 +