Saturday 29th and Sunday 30th March, 10.30am to 16.30pm - Shepherd's Cress, Teesdalia nudicaulis, and winter annuals recording, Grangemore, Portstewart, Co. Derry

In the past T. nudicaulis has been recorded from areas of dune both north and south of the Bann, at Grange More. The most recent records on the DDb for T. nudicaulis are from an area south of the Bann, adjacent to the railway line, in 2004. Therefore the aim of this weekend will be to (hopefully) refind, map and count the population of T. nudicaulis and record any other winter annuals found.