Botanica Lithuanica, Volume 2, Number 1

1996 m.

Characteristics of Isoeto-Nanojuncetea bufonii class and discussion on a hierarchic system of syntaxa are presented. Floristic composition, habitats and peculiarities of the communities of the Cypero fusci-Limoselletum aguaticae and Centunculo-Anthocerotetum punctati associations and Juncus bufonius in Lithuania are described.

Keywords: biodiversity, vegetation, classification of plant communiteis, Isoeto-Nanojuncetea, Lithuania.

Notes on species of the genera Sempervivum and Jovibarba occuring in Lithuania are presented. All available information has been analysed and on this basis it was concluded that S. ruthenicum should be excluded from the flora of Lithuania. Occurrence of S. tectorum in the territory is discussed. Distribution and status of Jovibarba globifera in Lithuania is breifly rewieved and synonymy is presented.

Keywords: Sempervivum ruthenicum, S. tectorum, Jovibarba globifera, nomenclature, Lithuania.

49 species of lignicolous Pyrenomycetes and Loculoascomycetes were recorded in Mažeikiai district (North-West Lithuania). 15 species are new to the Lithuanian mycota. Fungal relations to different kinds of substrate are discused.

Keywords: lignicolous fungi, Pyrenomycetes, Loculoascomycetes, Lithuania, habitat.

Fungi of the genus Septoria form a very plentiful group which includes more than 2000 species distributed all over the world. Most of them are parasites, damaging different plants. They cause diseases of cereals, damage forage and ornamental plants, fruit-trees, berry bushes, vegetables and wild plants. In some years fungi of this genus damage 80–100 % of plants. In the paper the data on 42 species of the genus new to Lithuania are presented. The other 6 species were reported from the territory earlier.

Keywords: Septoria, parasiting fungi, sexual stage, picnides, spores, intensity of the disease.

Changes and corrections of names of plant species which are listed in the Red Data Book of Lithuania are presented.

Keywords: nomenclature, plant species, Red Data Book, Lithuania.

Three new to Lithuania species of the genus Ramularia Sacc. (Hyphomycetes, Moniliaceae) are described. Ramularia magnusiana (Sacc.) Lindau is found parazitising on the leaves of Trientalis europea L., R. cynoglossi Lindr. – on Cynoglossum officinale L., R. anagallidis Lindr. – on Veronica anagallis-aquatica L. All these species were found in 1995 in Aukštaitija National Park (Ignalina district). Herbarium specimens are deposited in the Herbarium of the Institute of Botany (BILAS).

Keywords: Hyphomycetes, Moniliaceae, Ramularia magnusiana, R. cynoglossi, R. anagalidis, parazitic fungi, Lithuania.