The Nancy T Burbidge Memorial Amphitheatre was opened in the presence of Her Excellency, Lady Cowen, CStJ on 14 September 1980. The Amphitheatre is used as an open-air classroom and meeting place for students and other groups and was designed to assist in the education, conservation and scientific functions of the Gardens. The lectern is made from jarrah timber and was donated by Mr and Mrs D Cullity, of Perth, in recognition of Dr Burbidge's Western Australian background.