ADDITIONS TO THE RADULA (RADULACEAE: HEPATICAE) FLORAS OF NEW ZEALAND AND TASMANIA

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  Radula javanica a widespread Melanesian-oceanic species is recorded from the Kermadec Islands, the northern most landmass within the New Zealand Botanical District. The specimens upon which the New Zealand record of R. campanigera is based present themselves as an unusual taxon close to R. cordiloba, which is described as a new subspecies. R. cordiloba ssp. erigens M. Renner et Braggins ssp. nov. This taxon is known from only two collections from the Kermadec Islands. Radula cordiloba ssp. erigens differs from R. cordiloba in its unique localisation of caducous leaves on secondary branches which are determinate in growth, and the broadly ovate lobules that occasionally extend beyond the opposite stem margin. Radula campanigera is accordingly excluded from the New Zealand flora. The ranges of four more Radula species are extended to New Zealand: R. aneurysmalis, R. compacta, R. ratkowskiana and R. tasmanica were previously considered endemic to Tasmania; Radula tabularis is excluded from the New Zealand flora, specimens upon which this record is based are referable to R. ratkowskiana and R. tasmanica. Radula sainsburiana is reported new to Tasmania, and outside of New Zealand for the first time. Descriptions and illustrations of all seven species discussed are provided, as is a key to species of Radula currently known for New Zealand and Tasmania.