File talk:Juglans ailantifolia, Mount Auburn Cemetery.JPG

Quite likely a hybrid but no pure J. ailantifolia

Have seen an image of the same tree? as i do think. As commented upon there, i do suspect a crossing between J. regia and J. cinerea or ailantifolia, which are easily created by wind pollination. Pure Japanese walnut got much larger leaves with more numerous leaflets. Stamnaria0568 (talk) 09:46, 8 September 2016 (UTC)

Probably so called heartnut trees, Juglans ailantifolia var. cordiformis, got shorter leaves with fewer pairs of leaflets than typical Japanese walnuts. However, THIS TREE got leaves which could fit to some hybrid between Juglans regia and a member of the group comprising J. ailantifolia, mandshurica and cinerea, with sticky glandular hairs. Improved ID needed to see more details of leaves and fruits, in especial shape and structure of shells. Stamnaria0568 (talk) 08:22, 11 September 2016 (UTC)

Greetings! Thank you for the most interesting set of thoughts. Alas, I am not a botanist - I just copy information from the sign posted on the tree. It's quite possible that I got it wrong, or that I neglected to properly copy the "var. cordiformis" part of the information (or they may have omitted it from the sign). Sorry indeed to be adding another puzzle to the world... with all best wishes, Daderot (talk) 13:16, 11 September 2016 (UTC)