1. Chromium accumulation and toxicity in aquatic vascular plants

   • Prakash Chandra
   • Kamla Kulshreshtha

   OriginalPaper Pages: 313 - 327

2. Geographical distribution of wildLactuca species (Asteraceae, Lactuceae)

   • Aleš Lebeda
   • Ivana Dolezalová
   • Dave Astley

   OriginalPaper Pages: 328 - 356

3. Central Amazonian floodplain forests: Tree adaptations in a pulsing system

   • P. Parolin
   • O. De Simone
   • W. J. Junk

   OriginalPaper Pages: 357 - 380