In the 1930s and 1940s C.A. Gardner and H.W. Bennetts did considerable work identifying other species in Western Australia - leading to the publication of The Toxic Plants of Western Australia in 1956.
The granite areas have two types one is an area covered by Xanthorrhoea preissii, Gastrolobium calycinum with a Borya herbfield and the other is dominated by Melaleuca, Dodonaea also with a herbfield of Borya.