Confirmation of the presence of Eleocharis mamillata (H.Lindb.) H.Lindb. subsp. austriaca (Hayek) Strandh. (Cyperaceae) in Piedmont (Italy)

Eleocharis mamillata subsp. austriaca belongs to Eleocharis subser. Eleocharis. The presence of this entity in the Italian territory was known for almost all the Alpine administrative regions and for Calabria. According to the Portal to the Flora of Italy, this entity was reported for Piedmont based on erroneous records. Nevertheless, during a wide herbarium survey on the subseries Eleocharis, several old and recent specimens collected in Piedmont have been identified as Eleocharis mamillata subsp. austriaca. Therefore, we can confirm the presence of the taxon in this region and provide a distribution map on the basis of the analysed material.