Macadamia is a kind of tree nut, and its plants can be called Hawaiian fruit trees. It is an evergreen tropical tree with relatively high plants. The height of adult fruit trees varies from 5~ 15 meters, and there are even fruit trees as high as 18 meters. If saplings are planted, it usually takes 4-5 years to grow into fruiting plants. Usually, the flowering period of Hawaiian fruit is in April and May, and the fruiting period is in July and August, and some of them are in September and 10.

morphological character

Trees, 5-15m high. Leaves leathery, usually 3 whorls or nearly opposite, oblong to oblanceolate, 5- 15 cm long and 2-3(-4.5) cm wide, with acute to obtuse tips, sometimes slightly concave, and tapering base; 7- 12 pairs of lateral veins; There are about 10 sparse teeth on each side edge, and the leaves of mature trees are nearly entire; The petiole is 4- 15 mm long.

Racemes, axillary or subterminal, 8- 15(-20) cm long, sparsely pubescent; Flowers pale yellow or white; Pedicel 3-4 mm long; Bracts subovate, small;

Perianth tube is 8- 1 1 mm long, erect and pubescent; Filaments are short, anthers are about 1.5 mm long, connective is slightly prominent, short and obtuse; Ovary and style base are yellow-brown villous; Disk annular, dentate.

The fruit is spherical, about 2.5 cm in diameter, with a short tip, and the peel is 2-3 mm thick and cracked; Seeds are usually spherical, testa bony, smooth and 2-4(-5) mm thick. The flowering period is April-May (Guangzhou) and the fruiting period is July-August.

The flowering period of macadamia fruit in Guangzhou, China is from April to May, and the fruiting period is from July to August. Macadamia fruit (macadamia nut) is suitable for growing in mild, humid and windy areas. Therefore, Hawaiian fruit orchards should be built in places where there are few local strong winds all the year round and areas vulnerable to typhoons, and bamboo and branches should be used as support during the young tree period to prevent wind damage.