B. Papp szerk.: Studia Botanica Hungarica 32. 2001 (Budapest, 2001)

Erzberger, Peter: Ditrichum crispatissimum (Muell. Hal.) Paris, a new species of the Hungarian bryoflora, and Ditrichum flexicaule (Schleich. ex Schwaegr.) Hampe in Hungary

Plants intermediate between Ditrichum crispatissimum and D. flexicaule A few more specimens of D. flexicaule were found to display similarities with D. crispatissimum in some respects. Apart from the plants from Koloska rocks dealt with above, such transitional plants had been collected in three different localities. BP 94811. - Dr. A. Boros: Plantae Hungáriáé exsiccatae. Ditrichum flexicaule (Schleich.) Hampe c. set. Comit. Pest. In dolomiticis "Fekete hegyek" prope Budakeszi, versus Telki, 23.VII.1946, Alt. ca. 400 m. s. m. This specimen contains 3 large tufts of D. flexicaule with setae that have lost their capsules. It is referred to this species because of the presence of flagellae, orientation of dry leaves, leaf shape and length, structure of cells in basal sheathing part of leaf and the shape of the innermost perichaetial leaves - characters in typical states of D. flexicaule. Features approaching D. crispatissimum include length of plants (up to 5 cm), length of subula, and structure of cells towards costa at leaf base (some leaves with porose, elongate cells). BP 94839. - Dr. A. Boros: Plantae Hungáriáé exsiccatae. Ditrichum flexicaule (Schleich.) Hampe c. sporog. Comit. Borsod. In rupibus calcar. sept, silvat. montis "Nagy István erőse" prope Nagyvisnyó. 29.IX.1950, Alt. ca. 7-800 m. s. m. This specimen contains altogether 4 moss tufts, but of different appearance: there are two green-yellowish tufts of 4-5 cm long plants without sporophytes, with more or less crisped leaves, labelled (a) for the purpose of reference by the author; and two yellowish slightly shorter tufts with sporophytes and more or less straight leaves, labelled (b). Further distinguishing features include: (a) leaf length 1.8-2.5 mm, subula less than 2/3 of leaf length, juxtacostal basal cells rather short, eporose to slightly porose in most leaves, auricles present. (b) leaf length 2.2-3.3 mm, subula in some leaves longer than 2/3 of leaf length, juxtacostal basal cells elongate, more or less porose in most leaves, auricles not seen, but flagellae present. (a) is typical D. flexicaule. The plants of (b), although approaching D. crispatissimum in some character states, viz. subula length and structure of juxtacostal basal cells, can be named D. flexicaule because of the presence of flagellae and, especially, the shape of perichaetial leaves. Since (a) is a pure stand of Ditrichum, whereas (b) includes various moss and hepatic companions (e.g. Ctenidium molluscum, Encalypta sp., cf. Lophozia sp.), the different tufts probably did not form part of a mixed stand. A duplicate (BP 58744) contains two large tufts, 5-6 cm high, similar to (a). Two additional collections had been made at the same locality: BP 21308. 28. VIII. 1951, L. Vajda - 2 tufts of huge plants of D. flexicaule, ca 6-7 cm long; BP