• Growth Habit: Macadamias are large, spreading evergreen trees reaching 30 to 40 ft. high and almost as wide. More upright types are known and being selected because of their suitability for closer planting. The bark is rough but unfurrowed, brown and dark red when cut.
• The macadamia has proteoid roots, dense clusters of short lateral rootlets in well defined rows around the parent root axis. The prime function of such roots appears to be in increasing the surface area of the root system for maximum absorption. The vigor of seedlings appears to be related to the degree of proteoid root development.

Growth Habit: Macadamias are large, spreading evergreen trees reaching 30 to 40 ft. high and almost as wide. More upright types are known and being selected because of their suitability for closer planting. The bark is rough but unfurrowed, brown and dark red when cut.