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A revision of the genus Cinchona by Maria Lucia Kawasaki

By Maria Lucia Kawasaki

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The intrinsic desiccation tolerance of eurypoikilohydrous bryophytes can be modified by the rapidity of desiccation processes (Gaff 1980). Desiccation tolerance was observed to vary seasonally in many bryophytes (Dircksen 1964, Dilks and Proctor 1976a,b), in ferns (Kappen 1964), and also in Borya nitida (Gaff 1980) as they can acclimate to frost desiccation in winter or to summer drought. Several bryophytes (Dicranum scoparium and Mnium punctatum) and ferns (Asplenium spp. and Polypodium vulgare) gained an extremely high desiccation tolerance in winter (Dircksen 1964, Kappen 1964).

Tubiflora, V. luteola, Barbacenia reflexa; Kubitzki 1998) may retard water loss. Since stomatal conductance of resurrection vascular plants is, in general, rather high (Tuba et al. 1994), water loss must be retarded by structural features such as scales, as was shown for leaves of Cetrerach officinarum (Oppenheimer and Halevy 1962). However, scales were almost ineffective in Cheilanthes maranthae (Gebauer 1986, Schwab et al. 1989). 4a) has long been known (Bewley and Krochko 1982) and the efficiency of leaf pubescence in retarding water loss is increased when the leaves shrink (Gebauer et al.

Gaff and Latz 1978 Gaff and Churchill 1976 Gaff 1971 Csintalan et al. 1996 Gaff 1971 Gaff 1986a Until equilibrium >4 year 5 year 5 year Until equilibrium 0%–5% rh Air dry Air-dry Air-dry 0%–15% rh Mature leaf tissues: 5%–30% rh Gaff and Ellis 1975 Gaff 1986a 27 months 0%–5% rh Gaff and Bole 1986 Gaff and Ellis 1974 Gaff and Latz 1978 Hambler 1961 Gaff 1977 Gaff 1971 Gaff and Latz 1978 Gaff and Latz 1978 Ziegler and Vieweg 1969, Gaff 1971 Barthlott and Porembski 1996 Markowska et al. 1994 Kappen 1966 Markowska et al.

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