Juglans nigra
Black walnut Taxonomy
Synonyms: Subspecific taxa: Classification:
Other taxonomic & nomenclature sources: USDA Plants;  ITIS;  The Plant List;  IPNI Images
   
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Species Distribution
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County Map Legend
Absent: Not known from county Medium confidence: Medium or unknown confidence; often old records or unverifiable observations Medium-high confidence: Often observations by expert botanists High confidence: Often vouchered herbarium records Planted / introduced: Native species introduced outside historic range, or only in planted locations within county (e.g., restorations) Historic / extirpated: Only historic records for the species; likely extirpated (Note that this category is not yet functional) North American distribution maps for this species: FLNA;  USDA Plants;  BONAP;  BISON
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Species Status
Status/Listing: No Information Notes: Origin: Native
Species Description
General: Dicot-woody, perennial Roots: primary Shoots: alternate leaf arrangment; compound, pinnately leaf type; serrate leaf margin; Pinnate leaf venation; linear, lanceolate leaf shape Inflorescence: spike, catkin Flowers: unisexual, monoecious; incomplete, not petals; perigynous ovary position Fruit: nut Physiology: autotrophic; C3 C02 fixation Reproduction: sexual
Ecology & Natural History
Habitat: Species is distributed in rich woodlands at base of slopes or bluffs, valleys along streams. ILPIN Notes: This is a valuable timber tree. Wood is heavy, hard, strong, close-grained, and very durable in contact with the soil. Female flowers are perigynous and in spikes; pale brown, soft, hairy buds; large spherical fruits. Seed company numbers: 2, 4, 13, 14, 15, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 33, 35, 36, 37, 39, 40, 41, 52. Form - whips, bare roots, seedlings, seeds. Plant nuts soon after they drop in fall. Develops a strong tap root so difficult to transplant. Nut kernal is edible; causes hayfever; nut hulls were once used as a dye. Terrestrial furbearers (esp. tree squirrels) eat nuts as food. Regarding aquatic species food value, this pertains to aquatic furbearers. Functional Relationships:
Human Relationships:
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Coefficient of Conservatism (C-value) [?] :
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