engleski

Helianthemum jonium Lacaita & Grosser ex Fiori & Bég. (Cistaceae), a new species in the eastern Adriatic flora

The species Helianthemum jonium Lacaita & Grosser ex Fiori & Bég. (Cistacaeae) was described by Lacaita and Grosser from Taranto (Puglia) in southern Italy, while the name was published by Fiori and Béguinot in 1910. Till now, H. jonium has been known from Morocco and Italy where it has very scattered distribution along the Apennine Peninsula. The aim of this study was to investigate the presence and occurrence of H. jonium in the amphi-Adriatic area based on recent field research, literature and revision of herbarium specimens. The occurrence of H. jonium is reported here for the first time in Croatian and Montenegrin flora. In April and May of 2018, the species was found growing on sandy soils within macchia and garrigue vegetation on the eastern Adriatic islands of Biševo, Vis and Lopud. Therefore, a revision of herbarium specimens that are stored in CNHM, ZA, ZAGR and ZAHO revealed and confirmed the presence of H. jonium on the islands of Vis and Hvar and from Ulcinj in Montenegro. According to literature data from 1934 and 1940, H. jonium was cited also for sand dunes of Durres in Albania and completely neglected in recent botanical literature or floras. The examination of type materials of H. jonium revel the existence of syntypes deposited in different European herbaria, and in accordance to the ICN a lectotype is designated among Lacaita’s specimens from FI herbarium. Distribution map of H. jonium in the amphi- Adriatic area was also provided and now the species occurrence is extended easternmost.

amphi-Adriatic, Croatia, Italy, Montenegro, neglected species

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