生长习性、产地和用途——胡桃属包括15种落叶乔木或大型灌木,发生在北美、南美西北部,以及欧洲东北部至亚洲东部的温带地区。多数树种的木材有一定的使用范围,其中有些种对细木工、枪托及室内装修具有很高的利用价值。坚果供人类食用,也可供作野生动物食料。美国现有八个种或许有栽培的潜在价值(表1)。美国和其他国家广泛种植波斯核桃(J.regia)以生产坚果。 Growth Habits, Origin and Uses - Juglans include 15 deciduous trees or large shrubs occurring in temperate regions of North America, northwestern South America, and northeastern Europe to eastern Asia. Most species of wood have a certain range of use, of which some species of joinery, butt and interior decoration has a high value. Nuts for human consumption, but also for food for wildlife. Eight species in the United States may have cultivated potential value (Table 1). The United States and other countries widely planted J.regia to produce nuts.