Dear colleagues, In sods that had been used to build a late medieval dike in the western Netherlands I found the attached plant remains (overview, cross sections and squash of central part with thick-walled cells. Does anyone of you know which species has such appendages? A brackish or marine environment is possible. best wishes, Bas ------------------------------------------------- Dr Bas van Geel E-mail: [log in to unmask] Phone: +31 20 525 7664 Fax: +31 20 525 7832 http://home.medewerker.uva.nl/b.vangeel/ Institute for Biodiversity and Ecosystem Dynamics (IBED) http://www.science.uva.nl/ibed Research Group Paleoecology and Landscape Ecology Faculty of Science, Universiteit van Amsterdam Science Park 904, P.O. Box 94248 1090 GE Amsterdam, The Netherlands -------------------------------------------------