Juglans australis wood is dense (640 kg/m), hard, and strong. Upon drying, the radial shrinkage is 2.2%, the tangential 4.7%. The pinnately compound leaves are borne alternately, and bear up to fifteen oval-lanceolate finely serrate leaflets. The immature fruits are pickled whole for human consumption. The mature nuts are also eaten. Like most walnuts, "J. australis" produces juglone, an allelopathic substance which decreases competition from other plants growing nearby. The concentrated extract of the husk is also used as a vermifuge. Juglans australis Juglans australis, the nogal criollo, is a species of plant in the Juglandaceae family. This large, fast-growing tree can
Juglans olanchana Juglans olanchana Juglans olanchana is a semideciduous tree species in the Juglandaceae family. It can be found in Costa Rica, Guatemala, El Salvador, Honduras, Mexico and Nicaragua. It can grow up to 40 m in height and 1.5 m in diameter. The long branches bear twigs tipped with 40–50 cm long, glabrous, pinately compound leaves, darker on the top than on the bottom. The base of the trunk sometimes has buttresses. "Juglans olanchana" grows in wet and very wet tropical forests, most frequently on river banks, observed from 0–1400 m above sea level. Reports that it also grows in the