Species Detail - Square-stalked St John's-wort (Hypericum tetrapterum) - Species information displayed is based on the dataset "Irish vascular plant data 1999-2009".
Terrestrial Map - 10kmDistribution of the number of records recorded within each 10km grid square (ITM).
Marine Map - 50kmDistribution of the number of records recorded within each 50km grid square (WGS84).
Square-stalked St John's-wort
Hypericum quadrangulum, Square St. John's Wort
1 January (recorded in 1970)
7 December (recorded in 2005)
Dr David Thomas Holyoak, Irish vascular plant data 1999-2009, National Biodiversity Data Centre, Ireland, Square-stalked St John's-wort (Hypericum tetrapterum), accessed 23 September 2023, <https://maps.biodiversityireland.ie/Dataset/35/Species/42603>