B. Papp szerk.: Studia Botanica Hungarica 39. 2008 (Budapest, 2008)
Erzberger, P.; Schröder, W.: The genus Schistidium (Grimmiaceae, Musci) in Hungary
PÉTERFI (1916), who held the opposite opinion. It is interesting that Péterfi considered the possibility that plants named S. confertum growing on limestone rocks might prove to be S. brunnescens - and that in our revision this turned out to be true. BOROS's ( 1968) taxonomic treatment is similar to that of SZEPESFALVI (1941 ), he lists some more forms (f. irrigata, f. epilosa, f. laxum = f. gracile), varieties (var. nigrescens) and subspecies (subsp. conferta, subsp. brunnescens) of S. apocarpum s. 1. His f. irrigata was revised to S. apocarpum s. str.; under f. epilosa many different taxa were found, some belonging to different genera (S. apocarpum s. str., S. brunnescens subsp. brunnescens, S. crassipilum, S. belveticum, S. lancifolium, Didymodon acutus, D. insulanus, D. luridus, D. rigidulus); similarly "f. gracile" was found on specimen labels of S. crassipilum, S. apocarpum and S. lancifolium. Some specimens of S. crassipilum and S. apocarpum were labelled "var. nigrescens" by Boros. Specimens labelled "ssp. conferta" by Boros proved to be S. crassipilum or S. brunnescens subsp. brunnescens. However, plants that he named subsp. brunnescens consistently could be referred to S. brunnescens subsp. brunnescens. ORBÁN and VAJDA (1983) treat all taxa of Scbistidium as subspecies, varieties or forms of S. apocarpum, even S. ßaccidum, in this respect adopting the concept of LOESKE (1930). As for specimens collected by Vajda and bearing various subspecific labels, roughly the same applies as for Boros's collections: his f. irrigata and S. rivulare proved to be S. apocarpum, subsp. gracile was revised to S. crassipilum and S. apocarpum, but one specimen (BP 67976) labelled Grimmia apocarpa var. conferta could be confirmed as S. confertum, and S. brunnescens was also consistently confirmed. In Figure 2 the number of specimens of Scbistidium collected in the years between 1870 and 2007 (including the collections of the first author) is depicted, clearly showing two periods of collecting activity with respect to Scbistidium in Hungary: the first between 1905 and 1965, with major contributions by Boros, Degen, Szepesfalvi, Szurák and Vajda (compare Table 1 ), and the second between 1985 and 2007, with major contributions of Rajczy, Papp and the first author. In the distribution maps, collections from these two periods are represented by different symbols (open circles for the older collections, closed circles for the recent ones).
