Showing papers in "Botanical Journal of the Linnean Society in 1989"

TL;DR: The lichen flora on trees and wood at 50 sites in north-west London was examined in 1988 to determine what changes had taken place since 1980, a period when mean winter SO2 levels had fallen from around 130 μg m-3 to within the range 29–55 μg m -3 in the study area.

TL;DR: An updated monocotyledon taxonomy is presented and the classification of the angiosperms is appended.

TL;DR: Finds point to the probability that valvate anthers were more common in primitive angiosperms than previously thought, and the counterforce to the opening valves is provided on the morphological and not on the histological level.

TL;DR: An endothecial-like connective hypodermis is a notable characteristic among examined ‘Lower Hamamelididae’ (except Disanthus) and is also present in Daphnipfiyllum and Eucommia and it is hypothesize that this specialized connectives facilitates a broader opening of the anther.

TL;DR: Both the merophyte and the metamer have a role in clarifying the understanding of plant development since both provide insights into the functioning of the meristems from which they are derived and the structure of the module to which they contribute.

TL;DR: Three ideas about what governs the number of species at a locality are examined by locking at patterns of flower visits at Dungeness in comparison with those at Shoreham, a species-poor locality also in Kent.

TL;DR: Results obtained from Penicillium, Aspergillus and Fusanum species have shown that each species produces 5 to 15 different biosynthetic families of secondaiy metabolites, indicating that good chromatography data may be sufficient to identify species in the three genera.

TL;DR: Re-investigation of permineralized plants originally called Cooksonia sp.

TL;DR: Coastal shingle vegetation has a distinctive flora which contains several rare or declining species as well as some common coastal and ruderal plants.

TL;DR: A fungus, isolated from sugar cane in Queensland, Australia and causing the Poor Root Syndrome disease, is described and shown to be related to Verrucalvus and possesses verrucate oogonia containing plerotic oospores; it is placed in the Verru Calvaceae (Sclerosporales).

TL;DR: A synopsis of the 22 types of heathland recognized by the National Vegetation Classification is presented and maps showing their locations are given.

TL;DR: If no differences can be demonstrated which in themselves justify taxonomic separation, then features ought not to be allowed to influence the taxonomic decision.

TL;DR: Ovules arise as ovoid outgrowths; integument development involves periclinal divisions of hypodermal cells with the integument becoming bilobed and extended laterally; the mature ovule is flask-shaped.

TL;DR: Factorial analysis has been performed on a large collection from Central East Africa which enables the relationships between the foliicolous floras of the different types of forests present in the area to be determined.

TL;DR: Detailed analysis of coalified mater: and the distribution and fabric of pyrite in permineralizations shows that the original structure of the tracheids was similar to that in Gosslingia and most other zosterophylls, and that the taphonomic processes, with lignified walls preserved as coalified layers and softer tissues replaced by pyrITE, were also broadly the same.

TL;DR: Submerged wood, wood trapped amongst rocks, sand-buried wood and exposed roots and branches of shoreline trees were collected from three intertidal beach sites in the Seychelles for the presence of marine fungi, and the species present identified and their frequency of occurrence noted.

TL;DR: Recommendations are made to change the rank of some higher taxa, so as to render them homogeneous with respect to the P0,.

TL;DR: The genus Philippia Klotzsch has been reduced to synonymy under Erica L. and it is shown that the case for a similar action is very strong for Blaeria L and Ericinella KlotZsch.

TL;DR: It is suggested that the advantages associated with prolonging seed viability may have contributed to the evolutionary development of succulence in the reproductive unit and the presence of the receptacle during drying confers resistance to desiccation-associated damage.

TL;DR: The distinctive massive vascular connection of the phylloclade is made possible by syllepsis, and the normal structural constraints of elaborate appendage development in conifers is fully overcome.

TL;DR: The distribution and morphology of Mimulus cupriphilus, a new species restricted to two small copper mines in Calaveras County, California, is described and a comparison of flowers collected in the wild of M. guttatus and the new taxon shows that they differ considerably.

TL;DR: Studies of the biology and ecology of heather reveal a remarkable combination of characteristics, accounting for its success as a heathland dominant and its ability to persist under traditional forms of use and management.

TL;DR: Theophrastus's interest in plants is shown to be of a pure nature although most of his examples are cultivated or otherwise useful plants.

TL;DR: It is concluded that dissimilarity between samples as assessed by isozymes is probably related to the time of evolutionary divergence of those samples, and although allopolyploid, and morphologically very diverse, the group 1 agamospecies may have very recently diverged asexually from a common stock.

TL;DR: Comment is chiefly given on E. andevalensis, E. maderensis and the group currently denominated: E. manipuliflora,E.

TL;DR: An account of the ecology and conservation of the medicinal leech (Hirudo medicinalis (L.)) at Dungeness, Kent, is presented.

TL;DR: Studies on large numbers of conidia from the same isolate and from isolates referred to the same species showed the scanning electron microscopy results to be reproducible and provide an objective and accurate method for comparing micromorphological features.

TL;DR: Menyanthes trifoliata is shown to be a self-incompatible heterostylous species with a suite of associated pollen and gynoecium dimorphisms that may promote legitimate pollination and may actually represent many evolutionary units.