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Fig. 7. Desiccation tolerance of H. tunbrigense and H. wilsonii at three water potentials, approx. –40 MPa (approx. 74 % RH), –114 MPa (43 % RH) and –220 MPa (20 % RH), measured in terms of the chlorophyll‐fluorescence parameter FV/FM 20 min and 24 h after re‐wetting. Mean and s.d., n = 3. Material from White Wood, Holne, Dartmoor (Dec. 2001).
