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Black Booyong is a large rainforest tree, native to eastern Australia. It belongs to subfamily Sterculioideae/tribe Sterculieae of the angiosperm family Malvaceae. Common names include black booyong, blackjack, blush tulip oak, crowsfoot elm and Mackay tulip oak. The heartwood is coloured pink-brown. The buttress roots are pretty impressive, particularly on old trees. This spotting was quite young.
This spotting was in the Cumberland State Forest.
Some sources say the scientific name for this tree is Heritiera actinophyllum, not Argyrodendron actinophyllum. Even at the state forest itself, they used this scientific name. The booyongs in this forest all had rosette lichens growing extensively on them, as well as fine green moss growing on the more shaded southern side of their trunks. The growth line can be seen quite clearly in photo #2.