De najaarsexcursie 1992 in Noordoost-Twente

The autumn field meeting visited north east Twente. In moist heathland several decreasing hepatics were observed, such as Cephaloziella elachista, Cladopodiella francisci and Calypogeia arguta. Decaying grass appeared to be a suitable substrate for Leptodontium flexifolium. The fluviatile musci Fissidens arnoldii, F.gracilifolius and Rhynchostegiella curviseta appeared outside their usual area; Fissidens gracilifolius and Rhynchostegiella curviseta were growing on a sandstone. Other remarkable observations concerned Racomitrium aciculare, Bartramia pomiformis and Archidium alternifolium. A habitat reconstruction project by removal of the top layer in a heathland offered excellent conditions for Trematodon ambiguus, this moss had been found in The Netherlands only once before, over 130 years ago. At a location where the rare species Scorpidium lycopodioides and Drepanocladus sendtneri used to occur, only Scorpidium lycopodioides could be recovered.