Australian Plant Census (2011) available at http://www.anbg.gov.au/cgi-bin/apclist.
Australia's Virtual Herbarium (AVH) (2007). Council of Heads of Australian Herbaria (CHAH). Available at http://www.cpbr.gov.au/cgi-bin/avh.cgi
Parsons, W.T. & Cuthbertson, E.G. (2001). Noxious Weeds of Australia. CSIRO Publishing, Collingwood, Victoria.
Sainty G.R. & Jacobs S.W.L. (2003). Waterplants in Australia. Sainty and Associates Pty Ltd, Potts Point, New South Wales. Tasmanian Department of Primary Industry and Water (2007). Hornwort – Statutory Weed Management Plan 2007, Weeds, Pests and Diseases, Department of Primary Industry and Water, Tasmania. Available at http://www.dpiw.tas.gov.au/inter.nsf/WebPages/TPRY-5B97VK?open
Western Australian Herbarium (1998–). FloraBase – The Western Australian Flora. Department of Environment and Conservation. Available at http://florabase.dec.wa.gov.au