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 californica "J. californica" grows in riparian woodlands, either in single species stands or mixed with California's oaks ("Quercus" spp.) and cottonwoods ("Populus fremontii"). "Juglans californica" can be either a large shrub with 1–5 trunks, or a small, single-trunked tree. The main trunk can fork close to the ground, making it look like two trees that have grown together, then diverged. It has thick bark, deeply channeled or furrowed at maturity. It has large, pinnately compound leaves with 11–19 lanceolate leaflets with toothed margins and no hair in the vein angles. It has a small hard nut in a shallowly grooved, thick