21. It is unusual among the many South African Proteaceae in having male and female flowers on separate plants. 22. Brown formally described and named the species in his 1810 " On the Proteaceae of Jussieu ". 23. Peter H . Weston and Nigel Barker refined the classification of the Proteaceae in 2006, incorporating molecular data. 24. At the time, " Embothrium " was a wastebasket taxon to which many proteaceae were assigned. 25. George initially specialised in orchids, but his focus gradually moved to the Proteaceae Flora of Australia series of monographs. 26. Like most Proteaceae , " T . truncata " has fine proteoid roots that arise from larger roots. 27. Several other members of the Proteaceae are Banksia, Leucospermum, Grevillea and Macadamia ( known for its edible nuts ). 28. The waratah is a member of the plant family Proteaceae , a family of flowering plants distributed in the Southern Hemisphere. 29. Brown eventually published the species in his 1810 work " On the natural order of plants called Proteaceae ". 30. Evidence from pollen fossils suggest Proteaceae ancestors grew in Gondwana, in the Upper Cretaceous, 75-80 million years ago.
