Folia Geobotanica

Bělohlávková, Radmila; Fišerová, Daniela

doi: 10.1007/bf02854787pmid: N/A

For tall grasslands of Carpathian avalanche troughs with dominantFestuca carpatica (orPoa nemoralis subsp.montana) a new alliance ofFestucion carpaticae has been established. AssociationFestucetum carpaticaeDomin 1925 has been introduced into the alliance, with some new localities supported by phytocenological relevés. A new subass.senecietosum nemorensis was described from a forest zone. The plant community with dominantFestuca carpatica of the Roumanian Carpathian Mts. has been separated into a new associationSeslerio rigidae-Festucetum carpaticae and further, a new association of the same areaSaxifrago heucherifolii-Poetum montanae is described. Synmorfological, synecological, syntaxonomical and synchorological characteristics of the associations are mentioned.

Misra, M. K.; Misra, B. N.

doi: 10.1007/bf02854788pmid: N/A

Energy structure and dynamics of the primary producers of a protected grassland situated at Berhampur, Orissa was investigated. Concentration and standing crop of energy during different months of the year showed a great variation. The system transfer function and efficiency of the grassland were estimated.

Gordon Collon, E.; Velasquez, J.

doi: 10.1007/bf02854790pmid: N/A

Sagittaria lancifolia L. a perennial helophyte growing in shallow waters has asexual reproduction by rhizomes and sexual reproduction by achenes. We studied the morphological characteristics of achenes related to its dispersion, some factors affecting its germination and the development stages and growth of seedlings. This species produces many achenes, and disperses through epizoochory and hydrochory. Achenes germinate on light only. 100% germination was obtained at 25°C. Under conditions of inundation the germination period decreases, and the percentage of germination in creases when compared to achenes with or without imbibition. Achenes in anaerobic conditions have reduced germination.The growth of seedlings ofS. lancifolia was affected by the temperature: each organ of the seedlings grows differently in dependence upon this factor. For example, roots grow faster during the early stages of the seedlings.

Hadač, Emil

doi: 10.1007/bf02854792pmid: N/A

The frequency of diploids and polyploids in the flora and plant communities of the Temnosmrečinová dolina valley (High Tatras) and the valley dolina Siedmich prameňov (Belianské Tatry mts.) is discussed in connection with environmental conditions and life forms.

Komárek, Jiří

doi: 10.1007/bf02854793pmid: N/A

The article comprises three subsequently published studies of the taxonomy of Cuban cyanophyte/cyanobacterial flora: (4)Lyngbyopsis willei: This oscillatorialean genus and species, described byGardner (1927) from mountain creeks in Puerto Rico, was found more than 50 years later in similar localities in Cuba. The morphological variability of the Cuban populations is described and similarity with the genusSchizothrix (sect.Inactis) discussed. —(5)Cylindrospermum-species: The morphological variability of twenty-oneCylindrospermum-populations collected in Cuba was studied, documented by graphical methods and compared with the published data. Four new taxa were recognized (C. minutissimum v.rinoi, C. zonatum, C. bourrellyi, andC. desikacharyi). The other populations belong to the variation ranges ofC. breve, C. minutissimum, C. michailovskoense, andC. muscicola v.kashmiriense.— (6)Gomphosphaerioideae-species: Fifty eight populations (9 species) of the subfamilyGomphosphaerioideae (Microcystaceae, Chroococcales) from freshwater biotopes of Cuba were evaluated: Four planktic species with a probable cosmopolitan distribution were found (Coelosphaerium kuetzinginianum, C. minutissimum, Snowella lacustris andCoelomoron pusillus), and from the genusCoelomoronBuell two new species,C. microcystoides andC. vestitus were described. The tropical planktic speciesWoronichinia fremyi forms occasionally water blooms in larger reservoirs. Two tropical species from the genusGomphosphaeriaKütz, were recognized,G. multiplex (Nyg.) c. n. andG. semen-vitis sp. n.

Izco, J.; Guitian, J.

doi: 10.1007/bf02854795pmid: N/A

The present paper discusses the nomenclature problem of the nameChaerophyllo-Valerianetum pyrenaiceae: the later homonym appeared as the result of correction of another published name. Possible solutions are put forward.

Dostálek, Jiří

doi: 10.1007/bf02854797pmid: N/A