LEPIDIUM NAUFRAGORUM (BRASSICACEAE), A NEW SPECIES FROM WESTLAND, ANDNOTES ON OTHER NEW-ZEALAND COASTAL SPECIES OF LEPIDIUM

A new species, Lepidium naufragorum Garn.-Jones et D.A. Norton, is des cribed. It is compared with L. flexicaule, with which it had previousl y been included. L. naufragorum is endemic to Westland, and known from only six sites. It is assigned the IUCN threat status of ''Rare'', re flecting its restricted distribution and potential for decline. L. fle xicaule is apparently extinct in the North Island, but occurs sparingl y between Cape Farewell and Punakaiki in the South Island, where its d istribution overlaps with that of L. naufragorum. Taxonomic status and variation of L. banksii, L. obtusatum, and L. oleraceum are discussed , and a key to indigenous coastal species of Lepidium is provided.