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

Papp, Beáta, Ódor, Péter; Erzberger, Peter: Preliminary data about the present Hungarian local populations of rare European bryophytes

Old occurrence confirmed: Szabolcs-Szatmár county, Téb-erdő forest at Tarpa, in Que reus-Fraxinus grove forest, on Fraxinus tree trunks, ca 110 m a. s. I., 10.05.1999. and 05.09.1999, leg. and det. Papp, B., Ódor, P. Earlier data: 14.03.1961, leg. and det. Boros, Á., Vajda, L. It was found in a humid, old-growth part of the forest. We found it on two trees. The covered area was 200 cm

2 and 100 cm

2

, respectively. Orthotrichum sprucei Mont, is a euoceanic species endemic of Europe, normally occurring in Western Europe, growing on roots of trees or more rarely on stones near water. It is rare according to RDB. This species has been discovered in Hungary, more than 1000 km from its usual distributional area in 1998 in a place of special microclimate (ERZBERGER and PAPP 2000). New occurrence: Bács-Kiskun county, plain of Solt, canal Kelemen-széki táp csatorna, concrete sluice in the vicinity of Bordatanya (warden house), W of Fülöpszállás, inside wall of sluice chamber on wood attached to concrete, exposure NE, 90°, ca 90 m a. s. 1., 16.04.1998, leg. Erzberger, P., Papp, B., det. Erzberger, P. The population covers only a few cm

2

. The occurrence in this kind of man-made habitat seems to be unique. Pyramidula tetragona (Brid.) Brid. is a sub-Mediterranean, subatlantic species. It is a short-lived species occurring in open grasslands mainly in spring and autumn. It is included in the Bern Convention and in the Habitat Directives; it is vulnerable according to the RDB. It was already known from 8 localities in Hungary (Fig. 3). Fig. 3. Hungarian distribution of Pyramidula tetragona (for symbols see Fig. 1).