Names
Scientific synonyms (53): Juglans arguta Wall. ex C.DC., Juglans asplenifolia Dippel, Juglans dissecta Dippel, Juglans duclouxiana Dode, Juglans fallax Dode, Juglans fertilis Dippel, Juglans filicifolia Lodd. ex Loudon, Juglans frutescens Dippel, Juglans fruticosa Dippel, Juglans heterophylla Loudon, Juglans kamaonia (C.DC.) Dode, Juglans laciniata (Jacques) Dochnahl, Juglans longirostris Carrière, Juglans monophylla Dochnahl, Juglans orientis Dode, Juglans pendula (Pépin) Dochnahl, Juglans praematuriens Poitier ex Pépin, Juglans quercifolia N.Pierce, Juglans regia asplenifolia K.Koch, Juglans regia f. fruticosa Dippel, Juglans regia f. heterophylla (Jacques) C.K.Schneid., Juglans regia f. laciniata (Jacques) C.K.Schneid., Juglans regia f. monophylla (Dochnahl) C.K.Schneid., Juglans regia f. pendula (Pépin) C.K.Schneid., Juglans regia f. praematuriens (Poitier ex Pépin) Rehder, Juglans regia heterophylla Jacques, Juglans regia laciniata Jacques, Juglans regia lusus heterophylla (Jacques) Asch. & Graebn., Juglans regia lusus laciniata (Jacques) Asch. & Graebn., Juglans regia pendula Pépin, Juglans regia subsp. fallax (Dode) Popov, Juglans regia subsp. sinensis (C.DC.) Ohle, Juglans regia subsp. turcomanica Popov, Juglans regia var. angulosa A.Vilm., Juglans regia var. beloudschistana DC., Juglans regia var. corcyrensis Sprenger, Juglans regia var. depressa Risso, Juglans regia var. filicifolia K.Koch, Juglans regia var. fragilis Risso, Juglans regia var. kamaonia C.DC., and more.
In other languages
- en: English walnut
Where it is recorded
- USDA PLANTS: JURE80
- GRIN: 20772
- POWO: urn:lsid:ipni.org:names:442427-1
- Wikidata: Q46871
Taxonomy record sources: POWO (CC BY 4.0), USDA_PLANTS_CATALOG (Public Domain). Loaded from the botanica open cultivated-plant knowledge base and the GBIF backbone; each row keeps its origin.
Growth stages
- Initial: about 20 days (FAO 56 Table 11: planted April, Utah, USA)
- Crop development: about 10 days (FAO 56 Table 11: planted April, Utah, USA)
- Mid-season: about 130 days (FAO 56 Table 11: planted April, Utah, USA)
- Late season: about 30 days (FAO 56 Table 11: planted April, Utah, USA)
What the sources say it wants
Each line shows the band, then the kind of source and the citation. "Published" means the number is printed on the cited page; "derived" means it was computed from published numbers with the formula recorded on the row; "external API" rows are refreshed nightly from a live source; "curated" rows are OAT's own working values from June 2026.
Initial
| Zone | Measure | Band | Source |
|---|---|---|---|
| Timing | Crop coefficient, initial stage (ratio) | 0.5 | published: FAO Irrigation and Drainage Paper 56, 1998 |
Mid-season
| Zone | Measure | Band | Source |
|---|---|---|---|
| Timing | Crop coefficient, mid-season (ratio) | 1.1 | published: FAO Irrigation and Drainage Paper 56, 1998 |
Late season
| Zone | Measure | Band | Source |
|---|---|---|---|
| Timing | Crop coefficient, end of season (ratio) | 0.6518 | published: FAO Irrigation and Drainage Paper 56, 1998 |
Phenophases observed by the USA National Phenology Network
17 phenophases are tracked for this species and refreshed nightly, as stage triggers: >=50% of leaves colored, >=50% of leaves fallen, >=75% of full leaf size, All leaves colored, All leaves fallen, Breaking leaf buds, Colored leaves, Early season leaf expansion, Falling leaves, Flowers or flower buds, Fruits, Full pollen release, Leaves, Open flowers, Pollen release, Recent fruit or seed drop, Ripe fruits.
Keystone status
Partial. The KEEP rule asks for a growth stage and a band in each of light, air and root zone before a crop counts as complete; this plant is in the keystone with what its sources give so far.
Generated 2026-09-15 from the OAT plant keystone. Source types and citations are carried on every row; the keystone snapshot that the Library instruments read is plant-targets.json and its quality sheet is plant-targets.quality.json.