Institution: | 1. Alterra, Wageningen University and Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands;2. CEMAGREF, Avenue de Verdun 50, F-33612 Cestas Cedex, France;3. National Botanic Garden of Belgium, Department of Bryophyta & Thallophyta, Domein van Bouchout, B-1860 Meise, Belgium |