Athertonia diversifolia
| Atherton Almond | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| Order: | Proteales |
| Family: | Proteaceae |
| Genus: | Athertonia |
| Species: | A. diversifolia |
| Binomial name | |
|
Athertonia diversifolia (C.T.White) L.A.S.Johnson & B. Briggs |
|
| Synonyms | |
|
Hicksbeachia diversifolia (C.T.White) Sleumer |
|
Hicksbeachia diversifolia (C.T.White) Sleumer
Athertonia diversifolia, commonly known as Atherton Oak, is a small to medium-sized rainforest tree of the family Proteaceae found in northern Queensland, Australia. It is endemic to the Atherton Tablelands where it is widespread. A relative of the macadamia, it has potential as an ornamental tree and has an edible nut.
Athertonia diversifolia was first described by Queensland Government Botanist C.T. White in 1918, who gave it the specific name derived from the Latin diversi- "different" and folium "leaves", from the fact that different-shaped leaves may be found on the one plant. He placed it in the genus Helicia. The Dutch botanist Hermann Sleumer placed it in the genus Hicksbeachia in 1955, where it stayed until Johnson and Briggs placed it in its own genus although conceded it was related to the former genus. Thus, it is the only member of the monotypic genus Athertonia. Common names include Atherton almond, Atherton Oak, White Oak, or cream silky oak.
Athertonia diversifolia grows as a tree 8 to 30 m (26 to 98 ft) tall. The trunk may be buttressed and reaches a diameter of 30 cm (12 in). Juvenile leaves are a simple oblong shape with finely toothed margins but are replaced by large lobed intermediate leaves which reach 60 cm (23.5 in) long. The adult leaves are variable in shape, lobed or entire, 12–20 cm (4.5–8 in) long and 5–9 cm (2–3.5 in) wide. Young branches and new growth are covered in fine rusty hair. Occurring from March to June, the flowers are cream and brown in colour and borne on 15–34 cm (6–13.5 in) long racemes. The lens-shaped fruit is 3.6–4.1 cm (1.4–1.6 in) long by 3.3–3.8 cm (1.3–1.5 in) wide and 1.9–2.6 cm (0.75–1.02 in) thick, dark blue, containing a woody-shelled nut with a large edible and crunchy kernel, which ripen in spring.
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