Juglans californica

J. californica grows in riparian woodlands, either in single species stands or mixed with California's oaks (Quercus spp.)Climate model predictions indicate that *Juglans californica* may expand its range northward in response to warmer and drier conditions, potentially occupying areas currently inhabited by the endangered *Juglans hindsii* (Northern California black walnut).It has large, pinnately compound leaves with 11–19 lanceolate leaflets with toothed margins and no hair in the vein angles.Some authorities (e.g. the California Native Plant Society) combine this species with Juglans hindsii.On the other hand, a 2007 molecular analysis of the genus[8] suggests J. californica is sister to the remaining black walnuts (section Rhysocaryon).
Conservation statusNear ThreatenedIUCN 3.1Scientific classificationPlantaeTracheophytesAngiospermsEudicotsRosidsFagalesJuglandaceaeJuglansBinomial nameS. Wats.endemicCalifornia Coast RangesTransverse RangesPeninsular RangesovergrazingLos AngelesSanta Monica MountainsHollywood HillsriparianCalifornia's oaksQuercusPopulus fremontiipinnatelylanceolateChumash IndiansChannel Islands of CaliforniaVentura CountyCalifornia native plantxeriscapewildlife habitatnatural landscapingCalifornia Native Plant SocietyJuglans hindsiiIUCN Red List of Threatened SpeciesSterlingWayback MachineWikidataWikispeciesARKiveiNaturalistNatureServeOpen Tree of LifePlant ListTropicos