Macadamia is a genus of four tree species native to Australia (northeastern New South Wales, central/southeastern Queensland), family Proteaceae. Commercially cultivated for their nuts—also called Queensland nut, bush nut, maroochi nut, bauple nut, Hawaii nut. Aboriginal names: bauple, gyndl, jindilli, boombera.
Genetic/morphological studies (Mast et al., 2008) reclassified former Macadamia species:
Small to large evergreen trees (2–12m). Leaves in whorls of 3–6, lanceolate to obovate/elliptical, 6–30cm long, 2–13cm wide, entire or spiny-serrated margins. Flowers in long slender racemes (5–30cm), individual flowers 10–15mm, white to pink/purple, 4 tepals. Fruit: hard, woody, globose follicle with pointed apex, containing 1–2 seeds.
German–Australian botanist Ferdinand von Mueller named the genus in 1857 honoring John Macadam—Australian chemist, medical teacher, and politician.
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