The traditional view of the role of morphology in the water relations of lichens has been that the lichen thallus is purely passive with respect to water uptake and loss (Blum 1973). While water uptake and loss are certainly physical processes (Harris 1976), an overreliance on this view ignores the important significance of thallus mor phology and anatomy in controlling water relations. In the long term response, it is certainly true that lichen thalli of any morphology will come into equilibrium … Read more... 

The Australian continent is dominated by land which can be described as desert or semi-desert. Between latitudes 20° S and 33° S only the narrow strip of the eastern highlands and the extreme south-west are adequately watered. The south and east of the continent receive appreciable rains in the winter, whereas the north and east receive their rains in the summer, the remainder receives no appreciable seasonal rainfall (see Fig. la). Although there is some dry sub-alpine land in south-eastern Australia, … Read more... 

among else Umbilicaria corrugata collected in Gient Mountains (Riesengebirge/Krkonoše/Karkonosze) by the author; also a note ordinarily saxicolous species (Umbilicaria, Rhizocarpon) growing as epiphytes Read more... 

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