Francis Hallé, Vichith Lamxay and Patrick Blanc, observing a karst species during the Radeau des Cimes, Canopy Raft expedition, Photo Laurent Pyot, Phou Hin Poun NBCA, Khammouane, Laos, May 2012
Patrick Blanc and Juliana Prosperi looking at computer to identify some tree species during the Radeau des Cimes, Canopy Raft expedition, Photo AMAP, Phou Hin Poun NBCA, Khammouane, Laos, May 2012
Patrick Blanc and Francis Hallé setting herbarium specimens during the preparation of the Radeau des Cimes, Canopy Raft expedition, Phou Hin Poun NBCA, Khammouane, Laos, Jan. 2012