Showing papers in "Flora in 1994"

TL;DR: A survey of characteristic plant communities and species occurring on granite inselbergs, sandstone outcrops, and ferricretes in Guinea is given in this article, where the authors compare the vegetation of Guinean rain forests with similar localities in other parts of tropical Africa.

TL;DR: Overall analysis of this classification along with the differences in soil properties between the two topographic sites gives evidence that the forest probably expanded from the two valley bottoms towards the upland sector occupying sites that were previously covered with montane grasslands.

TL;DR: Although somewhat intermediate between ornithophily and chiropterophily, the floral features of the three species of Abutilon tend towards the bat-pollination syndrome.

TL;DR: In this paper, a phytosociological study was carried out using the quadrat method, with a total sample area of 5200 m2, divided in thirteen 400 m2 plots.

TL;DR: In this paper, the CO 2 gas exchange and microclimatic conditions of Leptogium azureum, a foliose lichen, were investigated in the lowland tropical forest of Barro Colorado Island, Panama.

TL;DR: The growth form and growth rhythm of seven Helleborus species of different sections are investigated on the basis of cultivated plants and herbarium specimens, and a hypothetical phylogenetic tree of the genus is presented.

TL;DR: Different aspects of seedling recruitment in Actaea spicata were investigated in deciduous and mixed coniferous forests in central Sweden, implying that, in general, local seed dispersal is very limited, and that clustering in adult A. Spicata populations reflects local seed disperseal pattern.

TL;DR: In this article, the flora of Enousses is analyzed and the plant species recognized are classified into 9 chorological groups and 5 life form types, and the results of this analysis confirm the Mediterranean character of the flora since the Mediterranean elements and the therophytes are predominant in the area.

TL;DR: The results show that there is no obvious allelopathic effect of S. marianum on the germination of other plants, and its germinability is relatively high and not affected by removal of the elaiosome.

TL;DR: TEM observations reveal that the suberin layer of the secondarily lignified cells and newly formed phellem cells possess a polylamellate structure, but it is not possible to attribute the ultrastructural activity to suberisation.

TL;DR: In this paper, the distribution of caulescent Andean rosettes ( Coespeletia timotensis Cuatr. forma lutescens ) was studied on a talus cone in the Venezuelan Andes in relation to substrate stability.

TL;DR: In this study salt tolerance of M. indica is associated with ion inclusion and this species maintained shoot K/Na and Ca/Na ratios and K versus Na selectivity high; this species possesses higher salt tolerance than M. sativa.

TL;DR: Dasypogon, Caleetasia and Kingia, with a large chalazosperm and both integuments forming the micropyle, are clearly closely allied, and distant from the other genera of Xanthorrhoeaeeae s.l. and most other Asparagales.

TL;DR: Subterranean organs of Cynanchum vincetoxicum, Asclepias curassavica and Ceropegia woodii (Asclepiadaceae) were studied in respect to their symbiosis with VAM-fungi and it was revealed that both, cultivated plants and those from their natural habitat, were infected by these fungi.

TL;DR: The seasonal dynamics of nitrogen reserve compounds depends not only on the climatic factors but also on the special behaviour of the sweet flag (Acorns calamus L.), which bears green submersed non-growing leaves in winter and leaf extension occurs earlier than that of surrounding plants in spring.

TL;DR: Five types of vagant cryptogams are found in the high-elevation areas of the Paramo de Piedras Blancas, in the northern (Venezuelan) Andes, which is the first to be ever described for the Andean cordillera.

TL;DR: The presented data do not seem to seriously contradict the recently suggested placement of Mussaendopsis in the tribe Coptosapelteae, although they might suggest a ± isolated position of the genus in this essentially paleo tropical tribe.

TL;DR: In this paper, the correlation between floristic richness and geographic latitude was studied for the British Isles, West Germany, and eastern Europe between 20°E and 34°E.

TL;DR: There are no fundamental differences in the embryogenesis of the three Carex -taxa; however, the dimensions and the shapes of the ovules during seed development were very variable and the intermediate form has the highest fruit weight and the highest seed volume and the seeds ripen faster.

TL;DR: An attempt is made to interprete the character progressions in connection with the ecogeographical differentiation which followed the alpidic orogenesis and the development of the Mediterranean climate during the late Tertiary.

TL;DR: In this paper, the seasonal dynamics of phytomass and nutrients of extensively used Ranunculo-Alopecuretum stands were observed with respect to the possibility of regeneration to species-rich wet meadows.

TL;DR: This paper tests the low temperature control of distribution hypothesis on all 5 varieties of the widely distributed succulent Cotyledon orbiculata in southern Africa to determine whether it has morphological and physiological attributes which confer tolerance to low temperatures.

TL;DR: Results necessitate further explanations by following investigations, especially those to evaluate the degree of genotypical fixation of the morphological differences observed in Solanum dulcamara.

TL;DR: It was concluded that these species may represent domesticated primary cereal crops; both are similar i.a. in convergent reduced seed dispersal abilities, i.e. tardily falling grains.

TL;DR: The three African, endemic rattan genera (Eremospcitha, Laccospenna, Oncocalamus) with about 25 species exhibit anatomically the same general structure as the Asian rattan palms.

TL;DR: In this paper, the geographical distribution of Erigeron neglectus was investigated and mapped in detail on the basis of revised herbarium material, showing that E. neglectus has a disjunctive northwest-eastern Alpine area reaching from Hautes-Alpes to Mallnitzer Tauern (Carinthia) and having its main centre in the Orison Alps.

TL;DR: In this paper, the authors presented an application and assessment of minimum spanning tree as a tool in comparative study of urban floras in seven of the 11 largest Polish cities (Bialystok, Gdansk, Katowice, Lublin, Poznan, Łodź, Warszawa).

TL;DR: This paper identified 18 vegetation groups associated with the distribution of Thymelaea hirsuta (an evergreen desert shrub) in six types of habitat (coastal ridge overlain by calcareous dunes, inland ridges, saline depressions, non-saline depressions and inland plateau with skeletal soils, and inland siliceous deposits) in the western Mediterranean region of Egypt.