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Juglans nigra L.
BLACK WALNUT
Life   Plantae   Dicotyledoneae   Juglandaceae   Juglans

Juglans nigra, Black Walnut
© Copyright Sheryl Pollock 2011 · 5
Juglans nigra, Black Walnut

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Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra
Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra

Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra
Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra

Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra
Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra

Juglans nigra
© Copyright Bobby Hattaway 2011 · 5
Juglans nigra
Juglans nigra, Black Walnut pistillate flower, Howard County, MD, HeLoMetz
© Copyright source/photographer · 5
Juglans nigra, Black Walnut pistillate flower, Howard County, MD, HeLoMetz

Juglans nigra, inflorescence - whole - male
© Copyright Steve Baskauf, 2002-2011 · 4
Juglans nigra, inflorescence - whole - male
Juglans nigra, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Juglans nigra, inflorescence - whole - unspecified

Juglans nigra, inflorescence - whole - male
© Copyright Steve Baskauf, 2002-2011 · 4
Juglans nigra, inflorescence - whole - male
Juglans nigra, bark - of a large tree
© Copyright Steve Baskauf, 2002-2011 · 4
Juglans nigra, bark - of a large tree

Juglans nigra, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Juglans nigra, inflorescence - whole - unspecified
Juglans nigra, whole tree or vine - general
© Copyright Steve Baskauf, 2002-2011 · 4
Juglans nigra, whole tree or vine - general

Associates · map
FamilyScientific name @ source (records)
Achilidae  Catonia nava @ UDCC_TCN (1)

Cixidia fusca @ UDCC_TCN (1)

Cixidia variegata @ UDCC_TCN (1)

Synecdoche grisea @ MEMU_ENT (1)
Aphididae  Appendiseta robiniae @ CSUC_TCN (2)

Monellia caryella @ CSCA_TCN (3)

Monelliopsis caryae @ AMNH_PBI (4); CSUC_TCN (8); NCSU (11)

Monelliopsis pallida @ CSCA_TCN (2)

Monelliopsis tuberculata @ CSUC_TCN (2)
Asterinaceae  Triposporium juglandis @ BPI (1)
Auriculariaceae  Auricularia auricula @ BPI (2)
Botryosphaeriaceae  Botryosphaeria ribis @ BPI (1)

Diplodia juglandis @ BPI (4)

Sphaeropsis juglandis @ BPI (6)

Sphaeropsis malorum @ BPI (2)

Sphaeropsis pericarpii @ BPI (4)
Braconidae  Trioxys ( @ AMNH_PBI (5)
Cicadellidae  Empoasca esuma @ III (1)

Empoasca fabae @ III (5)

Empoasca recurvata @ III (1)

Eratoneura acantha @ III (1)

Eratoneura adunca @ III (1)

Eratoneura bigemina @ III (2)

Eratoneura calamitosa @ III (8)

Eratoneura confirmata @ III (1)

Eratoneura lawsoni @ III (1)

Eratoneura maga @ III (1)

Eratoneura micheneri @ III (1)

Eratoneura millsi @ III (1)

Eratoneura osborni @ III (1)

Eratoneura parva @ III (1)

Erythridula cruciformis @ III (3)

Erythridula divisa @ III (19)

Erythridula falcata @ III (1)

Erythridula noeva @ III (10)

Erythridula tenuispica @ III (2); AMNH_IZC (1)

Oncopsis distinctus @ UCR_ENT (3)

Oncopsis verticus @ MEMU_ENT (1)

Paraphlepsius ( @ AMNH_PBI (3)

Pediopsoides ( @ NCSU_ENT (1)
Cixiidae  Cixius coloepeum @ UDCC_TCN (1)

Cixius nervosus @ UDCC_TCN (5)

Haplaxius pictifrons @ UDCC_TCN (3)

Melanoliarus ecologus @ UDCC_TCN (2)
Coccidae  Parthenolecanium corni @ CSCA_TCN (2)
Corticiaceae  Corticium incarnatum @ BPI (1)
Davidiellaceae  Cladosporium pericarpium @ BPI (1)
Derbidae  Anotia @ MEMU_ENT (4)
Dermateaceae  Cylindrosporium juglandis @ BPI (1)

Gloeosporium juglandis @ BPI (1)

Marssonina juglandis @ 403584B (1); 403584A (1); BPI (101)
Diaporthaceae  Phomopsis @ BPI (1)
Diaspididae  Aspidiotus ancylus @ MEMU_ENT (1)

Diaspidiotus aesculi @ CSCA_TCN (6)

Diaspidiotus juglansregiae @ CSCA_TCN (1)

Diaspidiotus perniciosus @ CSCA_TCN (1)

Hemiberlesia rapax @ CSCA_TCN (2)
Diatrypaceae  Diatrype stigma @ BPI (1)

Eutypa scoparia @ BPI (1)

Eutypella juglandicola @ BPI (2)

Eutypella juglandina @ BPI (1)
Didymiaceae  Trabrooksia @ BPI (1)
Erysiphaceae  Microsphaera alni @ BPI (7)

Phyllactinia suffulta @ BPI (1)
Flatidae  Metcalfa pruinosa @ UDCC_TCN (2)
Ganodermataceae  Ganoderma lucidum @ BPI (1)
Gnomoniaceae  Gnomonia leptostyla @ 611479A (1); BPI (12); 611479B (1)

Ophiognomonia vasiljevae @ BPI (1)

Ophiognomonia @ BPI (1)
Helotiaceae  Strossmayeria @ BPI (1)
Hysteriaceae  Glonium stellatum @ BPI (1)
Issidae  Thionia simplex @ UDCC_TCN (5)
Leptosphaeriaceae  Coniothyrium incrustans @ BPI (1)
Melanconidaceae  Melanconis carthusiana @ BPI (1)

Melanconis juglandis @ BPI (3)

Melanconium oblongum @ BPI (4)
Membracidae  Atymna querci @ UDCC_TCN (1)

Enchenopa binotata @ UDCC_TCN (13); ANSP_ENT (2); UCR_ENT (11); NCSU (30)

Entylia carinata @ NCSU (1)

Micrutalis calva @ UDCC_TCN (18); NCSU (9)

Telamona unicolor @ UDCC_TCN (1)
Microstromataceae  Microstroma brachysporum @ BPI (1)

Microstroma juglandis @ BPI (60)

Microstroma leucosporum @ BPI (1)
Miridae  Blepharidopterus diaphanus @ NCSU_ENT (3)

Blepharidopterus provancheri @ AMNH_PBI (4)

Ceratocapsus digitulus @ AMNH_PBI (1)

Ceratocapsus fasciatus @ AMNH_PBI (1)

Ceratocapsus uniformis @ NCSU_ENT (1)

Dichrooscytus repletus @ AMNH_PBI (1)

Gn_orthotylinigp7 sp_003 @ AMNH_PBI (1)

Gn_orthotylinigp7 sp_nsp_001 @ AMNH_PBI (1)

Lopidea hesperus @ NCSU_ENT (6)

Lopidea staphyleae @ AMNH_ENT (2)

Neolygus atricallus @ AMNH_PBI (1)

Orthotylus juglandis @ NCSU_ENT (6)

Orthotylus sp_ms_schuhi @ AMNH_PBI (1)

Phytocoris depictus @ NCSU_ENT (1)

Plagiognathus albatus @ NCSU_ENT (10)

Plagiognathus punctatipes @ NCSU_ENT (5)

Reuteroscopus unknown @ AMNH_PBI (2)

Tupiocoris agilis @ AMNH_ENT (1)
Mycosphaerellaceae  Cercospora juglandis @ BPI (5)

Mycosphaerella juglandis @ BPI (1)

Phloeospora multimaculans @ BPI (8)

Septoria nigromaculans @ BPI (4)
Nectriaceae  Cylindrocladium scoparium @ BPI (1)

Fusarium juglandinum @ BPI (3)

Fusarium salicis @ BPI (1)

Fusarium @ BPI (2)

Nectria cinnabarina @ BPI (6)

Nectria coccinea @ BPI (2)

Nectria episphaeria @ BPI (2)

Nectria galligena @ BPI (19)

Nectria mammoidea @ BPI (1)

Nectria @ BPI (2)

Neonectria ditissima @ BPI (2)

Neonectria @ BPI (3)

Tubercularia nigricans @ BPI (1)

Tubercularia vulgaris @ BPI (2)
Orbiliaceae  Orbilia curvatispora @ BPI (1)
Polyporaceae  Coriolus versicolor @ BPI (1)

Fomes everhartii @ BPI (8)

Fomes igniarius @ BPI (3)

Lenzites trabea @ BPI (2)

Perenniporia ohiensis @ BPI (1)

Polyporus gilvus @ BPI (4)

Polyporus hirsutus @ BPI (1)

Polyporus tulipiferus @ BPI (1)

Poria purpurea @ BPI (1)

Trametes hydnoides @ BPI (3)

Trametes @ BPI (1)
Psathyrellaceae  Ozonium omnivorum @ BPI (1)
Pseudococcidae  Pseudococcus dispar @ CSCA_TCN (1)
Pyralidae  Amyelois transitella @ UCRC_ENT (1)
Sarcosomataceae  Strumella coryneoidea @ BPI (1)
Schizophyllaceae  Schizophyllum commune @ BPI (2)
Steccherinaceae  Odontia arguta @ BPI (2)
Stereaceae  Stereum albobadium @ BPI (2)
Stictidaceae  Schizoxylon compositum @ BPI (2)

Stictis sphaeroboloidea @ BPI (1)
Tingidae  Corythucha juglandis @ UDCC_TCN (12); NCSU (25)

Epimixia sp_ms_aboccidente @ AMNH_PBI (1)
Typhulaceae  Sclerotium rolfsii @ BPI (1)
Valsaceae  Cytospora albiceps @ BPI (1)

Cytospora juglandicola @ BPI (7)
Xylariaceae  Hypoxylon glomeratum @ BPI (3)

Hypoxylon investiens @ BPI (1)

Hypoxylon rubiginosum @ BPI (5)

Hypoxylon tinctor @ BPI (1)

Nummularia repanda @ BPI (1)

Rosellinia aquila @ BPI (1)

Rosellinia pulveracea @ BPI (1)

Xylaria hypoxylon @ BPI (1)
_  Coriolellus sepium @ BPI (1)

Sphaerosporium lignatile @ BPI (1)

Trichothecium roseum @ BPI (1)

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FNA | Family List | FNA Vol. 3 | Juglandaceae | Juglans

2. Juglans nigra Linnaeus, Sp. Pl. 2: 997. 1753.

Black walnut, noyer noir

Wallia nigra (Linnaeus) Alefeld

Trees , to 40(-50) m. Bark medium to dark gray or brownish, deeply split into narrow rough ridges. Twigs with distal edge of leaf scar notched, usually deeply, not bordered by well-defined band of pubescence; pith light brown. Terminal buds ovoid or subglobose, weakly flattened, 8-10 mm. Leaves 20-60 cm; petiole 6.5-14 cm. Leaflets (9-)15-19(-23), lanceolate or ovate-lanceolate, symmetric or weakly falcate, (3-)6-15 × 1.5-5.5 cm, margins serrate, apex acuminate; surfaces abaxially with capitate-glandular hairs, simple or 2-rayed fasciculate hairs, and scales scattered over veins and blade, axils of proximal veins with prominent tufts of fasciculate hairs, adaxially glabrous except for scattered capitate-glandular and fasciculate hairs on midrib; terminal leaflet small or often absent. Staminate catkins 5-10 cm; stamens 17-50 per flower; pollen sacs 0.8-0.9 mm. Fruits 1-2, subglobose to globose, rarely ellipsoid, 3.5-8 cm, warty, with scales and capitate-glandular hairs; nuts subglobose to globose, rarely ellipsoid, 3-4 cm, very deeply longitudinally grooved, surface between grooves coarsely warty. 2 n = 32.

Flowering spring (Apr-May). Rich woods; 0-1000 m; Ont.; Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis.

Variation of Juglans nigra in central Texas and south-central Oklahoma should be studied; specimens seemingly intermediate between J . nigra and both J . major and J . microcarpa have been seen from this area. E. C. Twisselman (1967) incorrectly reported that J . nigra was locally naturalized in California; his specimens were all J . hindsii (possibly introgressed with J . nigra ) and J . californica .

Juglans nigra is frequently cultivated as an ornamental, and the nuts are prized for their strong, distinctive flavor.

Native Americans used Juglans nigra medicinally as a miscellaneous disease remedy, a dermatological aid, and a psychological aid (D. E. Moerman 1986).

Updated: 2024-05-22 07:56:19 gmt
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