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

Jakab, Gusztáv: Three bryophytes new to Romania

Drepanocladus pseudostramineus (C. Muell.) G. Roth Syn.: Calliergidium pseudostramineum (C. Muell.) Grout, Drepanocladus fluitans f. pseudostramineus Moenk., Warnstorfia pseudostraminea (C. Muell.) Tuom. et T. Kop. The Barsa pit is a closed basin of the Padis-Fortress of Ponor depression in the Bihor Mts. The so-called Black pond is a suspended doline-pond with dark water in the Barsa pit near the Barsa ice-cave. The pond is surrounded by Picea forest. During our field survey on 18 August, 1999 some sedges on the shore and one moss species were found in the water. The latter proven to be the rare Drepanocladus pseudostramineus which is new to the bryophyte flora of Romania. Description of Drepanocladus pseudostramineus according to HEDENÄS (1993): Medium-sized, sparsely or sparsely radially branched plants, green, yellow-green or brownish. Stem leaves narrowly ovate-triangular or ovate, +straight or slightly falcate; margin ientire to finely denticulate; nerve weak or rather strong, reaching just above mid-leaf to 4/5 way up the leaf. Alar cells forming an isodiametric or, more rarely transversely triangular group; supra-alar cells often forming an oval or rectangular group along lower leaf margin. Stem leaf apex acuminate or obtuse, often incurved. Drepanocladus pseudostramineus is closely related to D. tundrae (Arn.) Loeske. D. pseudostramineus is distingushed by less decurrent alar cell groups, a more circular stem transverse section and often a narrowly obtuse apex (Janssens 1983). Both species form the connecting link between Warnstorfia and the true Calliergon species (TUOMIKOSKI and KOPONEN 1979). The specimen was easily distinguishable from the Calliergon species with its leaves gradually tapering to an acumen, and from the other Drepanocladus and Warnstorfia species with the features mentioned above. The most conspicuous feature is the obtuse and incurved leaf apex (Fig. 2). Fig. 2. Drepanocladus pseudostramineus: A = stem leaves; B = alar cells; C - pseudoparaphylla; D = medial leaf cells; E = marginal leaf cells halfway up the leaf (HEDENÄS 1993, JANSSENS 1983).