Accepted for publication 8 August 2011 A taxonomic revision of Pseudoweinmannia Engl. (Cunoniaceae: Geissoieae) Andrew C. Rozefelds¹ & Belinda Pellow² Summary Rozefelds, A.C. & Pellow, B. (2011). A taxonomic revision of Pseudoweinmannia Engl. (Cunoniaceae: Geissoieae). Austrobaileya 8(3): 252–266. The vegetative and reproductive morphology of Pseudoweinmannia is described and illustrated. The genus is endemic to eastern Australia with two species, Pseudoweinmannia apetala (F.M.Bailey) Engl. and P. lachnocarpa (F.Muell.) Engl., that can be differentiated by their leaf serration, stipule morphology and lower and fruit characters. New interpretations of loral and fruit morphology in Pseudoweinmania are discussed, and their signiicance in better understanding the phylogenetic relationships within the tribe Geissoieae are examined. Key Words: Cunoniaceae, Geissoieae, Pseudoweinmannia, Pseudoweinmannia apetala, Pseudoweinmannia lachnocarpa, Australia lora, Queensland lora, New South Wales lora, comparative morphology ¹Andrew C. Rozefelds, Queensland Museum, GPO Box 3300, South Brisbane, Queensland 4101, Australia. Email: andrew.rozefelds@qm.qld.gov.au ²Belinda Pellow, Janet Cosh Herbarium, Department of Biological Sciences, University of Wollongong, Northields Avenue, Wollongong, New South Wales 2522, Australia. Introduction The family Cunoniaceae includes 15 genera in Australia, which are all primarily rainforest trees and/or shrubs, and are currently being revised for the Flora of Australia. Recent revisions have been completed on the genera: Anodopetalum A.Cunn ex Endl. (Barnes & Rozefelds 2000), Ceratopetalum Sm. (Rozefelds & Barnes 2002), Davidsonia F.Muell. (Harden & Williams 2000), the Australian species of Geissois Labill. (Schimanski & Rozefelds 2002), Vesselowskya Pamp. (Rozefelds et al. 2001) and a new species of Gillbeea F.Muell. was described from north eastern Australia (Rozefelds & Pellow 2001). In this paper a revision of the Australian endemic genus Pseudoweinmannia Engl. is presented. Pseudoweinmannia was proposed by Engler (1930) for two species, Weinmannia lachnocarpa F.Muell. and W. apetala F.M.Bailey from eastern Australia, which he referred to the tribe Cunonieae (R.Br.) Schrank & Mart. in Cunoniaceae. Pseudoweinmannia differs from Weinmannia, the major genus in this tribe, in lacking petals, having a polyandrous androecium and tardily-dehiscent fruits. Based upon an analysis of stipule morphology Dickison & Rutishauser (1990) concluded, that Pseudoweinmannia was more closely related to Geissois and Lamanonia Vell. in the Tribe Belangerae Lindl ex Pfeiff. (= Tribe Geissoieae Endl. ex Meisn.), than to the Tribe Cunonieae. In a cladistic analysis using morphological characters, Hufford & Dickison (1992) showed that Pseudoweinmannia was sister to Geissois (including Lamanonia), as it shared with this genus, lateral stipules (Dickison & Rutishauser 1990), racemose inlorescences and a polyandrous androecium. Dickison (1984) and Hufford & Dickison (1992) also identiied structures on the seeds as elaiosomes, which they interpreted as a putative autapomorphy for the genus. Combined morphological and molecular data based upon analysis of rbcL, and intron and spacer regions in the combined trnL-G region, and chloroplast DNA data provide support for interpreting Pseudoweinmannia and Geissois sens. lat. as sister taxa (Bradford & Barnes 2001). These authors recircumscribed the