Flora of North America species comparison

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Juglans cinerea

butternut, noyer cendré, noyer cerdr, white walnut
Habit 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.
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.
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.
Terminal

buds conic, flattened, 12-18 mm.
Staminate

catkins 6-14 cm;

stamens 7-15 per flower;

pollen sacs 0.8-1.2 mm.

Juglans cinerea
Phenology Flowering spring (Apr–Jun).
Habitat Rich woods of river terraces and valleys, also dry rocky slopes
Elevation 0-1000 m (0-3300 ft)
Distribution
from FNA
AL; AR; CT; DE; GA; IA; IL; IN; KY; MA; MD; ME; MI; MN; MO; MS; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WI; WV; NB; ON; QC
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Discussion

Of conservation concern.

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

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3.
Parent taxa Juglandaceae > Juglans
Sibling taxa
J. californica, J. hindsii, J. major, J. microcarpa, J. nigra
Synonyms Wallia cinerea
Name authority Linnaeus: Syst. Nat. ed. 10, 1272. (1759)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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