 B. toomansis is the species originally described and illustrated by Berkeley and Broome. The type collection was found on a cone of Banksia marginata on the banks of the Tooma River of New South Wales. It has also been recovered from a cone of Banksia sphaerocarpa from near Busselton in Western Australia, B. nutans, B. pulchella, B. speciosa, and B. occidentalis, all from Mount Merivale, 20 km (12 mi) east of Esperance, B. baxteri cultivated at Cranbourne Botanic Gardens, B. integrifolia from the Blue Mountains, and B. marginata from Kangaroo Island. Synonyms include Tympanis toomansis Berk. & Br., and Encoelia toomansis (Berk. & Br.). Its ascospores can range in shape from elliptical to cylindrical, and have dimensions of 6 – 10 by 2.5 – 3 µm.
