Himantoglossum adriaticum H. Baumann is a long-lived perennial orchid with an adriato-mediterranean
distribution. The species-level separation of this species from the more geographically
widespread H. hircinum has only recently been confirmed via a combination of molecular
and morphometric techniques, which are further developed here. To provide a comprehensive
overview of its autecology we integrated previously published information with extensive
unpublished data derived mainly from populations in the Keszthely Hills of Hungary.
In this paper we assess the distribution, habitat preferences, life history and seed
germination (ex situ and in situ) of H. adriaticum, with special emphasis on its reproductive
biology.