How about heartnuts for Valentines? A natural mutation of the Japanese walnut (synonym Juglans sieboldiana), heartnut, Juglans ailantifolia var. cordiformis, is hardier than the more familiar English or Persian walnut (J. regia), certainly up to the southern Great Lakes region. There the climate is similar to its native Japan and the Sakhalin area of southeastern Russia. Not only do the small- to medium-size trees produce delicious nuts but they are highly ornamental, with huge leaves divided into numerous leaflets, attractive catkins in late spring and long racemes of nuts in early fall.