B. Papp szerk.: Studia Botanica Hungarica 30-31. 1999-2000 (Budapest, 2000)

Jakab, Gusztáv: Three bryophytes new to Romania

Drepanocladus pseudostramineus is a subarctic moss. The Black pond is just about 1350 m above sea level. This is a surprising occurrence because of the quite low altitude. However, if we consider that numerous bryophytes with arctic and alpine character occur in the Padis area at such a low altitude this new data is not an extraordinary one. Such species include My lia taylorii (Hook.) S. F. Gray, Bryum uliginosum (Brid.) B. et S., Heterocladium heteropterum B., S. et G. (Eszkimó ice-cave), Myrinia pulvinata (Wahlenb.) Schimp., Plagiobryum zierii (Hedw.) Lindb. (BOROS and VAJDA 1974), Platydictya jungermannioides (Brid.) Cram., Tortella fragilis (Dramm.) Limpr. (Black cave), Cyrtomnium hymenophylloides (Hueb.) Nyh. ex T. Kop. (Barsa ice-cave), Amblyodon dealbatus (Hedw.) B. et S. (Ponor glade), Meesia uliginosa var. alpina (Funck ex Bruch) Hampe (Fortress of Ponor) (JAKAB 2000). This phenomenon can be easily interpreted with the special geological features of the area (ice-caves, deep depressions) which cause the inversion of climate and certain changes in the vegetation. The thermal inversion is particularly characteristic of this area (CSŰRÖS 1981, POP 1997). On the other hand, the bryophytes, compared with vascular plants, have relative low habitat requirements, that is, they are more flexible in this regard. Schistidium trichodon (Brid.) Poelt Syn.: Schistidium apocarpum subsp. longidens (Philib.) Wijk et Marg., Grimmia trichodon Brid. The author has collected a blackish Schistidium from bare rock surfaces and near springs in the Bihor Mts, which proved to be the rare S. trichodon. It is a rare boreal-montane element and again, is new to the bryophyte flora of Romania. Description of S. trichodon according to Smith (1978): Plants blackish, stems leafless below; hair-point 0-60 pm long; nerve and cells smooth above or with low papillae. Peristome teeth (450-)500-650(-750) pm long, filiform, fragile; spores 8-10 pm. Capsule common in winter. Blackish, straggling patches on basic, montane rocks. The filiform, long peristome teeth, and the short hair-points can be easily recognised on the specimen. The leaf apex is slightly denticulate in the collected material which does not agree with Smith's (1978) description. S. trichodon is blackish and much larger than the common S. apocarpum (Hedw.) B. et S. (Fig. 3). On 17 August, 1999 the bryophytes of the Fortress of Ponor were studied. The Fortress of Ponor is the most grandiose karstic formation in Transsylvania. It consists of three big stone circles which lie in a huge afforested depression of 300 m deep and more than 1 km in diameter at its upper level. The following bryophytes were recorded from the location: Barbilophozia kunzeana (Hueb.) K. Muell., Ble-