Showing papers in "Botanical Journal of the Linnean Society in 2003"

TL;DR: Internal transcribed spacer data have been obtained from 190 terrestrial orchid species, encompassing all genera and the great majority of the widely recognized species of Orchidinae, a heterogeneous selection of species of Habenariinee, and single species of Satyriinae and Disinae (the latter serving as outgroup).

TL;DR: In this paper, phylogenetic relationships between Magnoliales and Myristicaceae were investigated using a morphological matrix (115 characters) and multiple molecular data sets (seven variable chloroplast loci and five more conserved genes; 14 536 aligned nucleotides).

TL;DR: During a cytotaxonomical study of a Kuwaiti diploid population of Diplotaxis harra (Forssk.) Boiss, cytomixis and aneuploidy were found in 1.5% and 7.8% of the pollen mother cells (PMCs), respectively.

TL;DR: Stomatal length and stomatal frequency are rapid indirect methods to identify ploidy level in black wattle.

TL;DR: Cycad neurotoxins are concentrated in cycad reproductive organs, with the highest concentrations being found in the immature staminate sporangium and the outmost layer of the sarcotesta, consistent with the putative evolutionary role of BMAA as an antiherbivory compound, as well as the biomagnification of the compound in flying foxes that ingest the seed sarcOTesta.

TL;DR: This study presents the first review of the different ecological types within the Trichomanes L., a clearly defined genus for which a phylogeny is presently being developed, to investigate the appearance of the climbing and epiphytic habits, as well as the related supposed adaptive characters.

TL;DR: The Lejeuneaceae are the largest family of the liverworts (Hepaticae), with almost a thousand species in 91 currently accepted genera, and phylogenetic relationships remained largely unresolved, although several putative lineages were detected in majority rule trees.

TL;DR: The pollination ecology of Arum italicum was studied in south-western France and found that obligate cross-pollination is necessary for A. italicum to set seeds, and hand- and natural-pollinated plants showed similarly high abortion frequencies suggesting that seed set may be more constrained by resources rather than by pollination limitation.

TL;DR: Genetic variation is extremely low in disjunct populations of A. wulfeniana in the Dolomites and in A. brevis growing in the Southern Alps, and in the taxonomically closely related A. alpina, no genetic-geographical structure was found.

TL;DR: Phylogenetic and biogeographical analyses of nrDNA ITS and plastid trnL-F sequences for all continental groups of the genus Crinum and related African genera are presented, with the genus Amaryllis used as outgroup.

TL;DR: Consideration of the entirety of the fossil record of Tsuga indicates that the earliest representatives of the genus closely resembled T. mertensiana and that diversification ofThe genus occurred mainly during Miocene and Pliocene time as global climate cooled and new habitats formed in response to major orogenic events.

TL;DR: Although sexual reproduction and gene flow between populations of I. aphylla were very limited, they preserved high levels of genetic diversity, indicating that genetic diversity was independent of population size.

TL;DR: The results suggest that Scalesia affinis is partly self-incompatible, and outcrossing is assured by the endemic carpenter bee, Xylocopa darwini, which proved to be an important pollinator of ScalesIA affinis.

TL;DR: The fronds and compound tendrils of the Stephanian seed fern Blanzyopteris praedentata possess several types of trichomes, two of which may, based on their morphology, have functioned as deterrents against herbivores.

TL;DR: Pollen morphology strongly supports section Enantiophyllum as a monophyletic group and the results indicate that pollen characters may be significant in infrageneric systematics in Dioscorea.

TL;DR: A new species of Centaurea L. yildiziiŞ.

TL;DR: Analysis of chromosome number, variations of total chromosome length (TCL) and average chromosomes length (ACL), Nombre Fondamental (NF) and karyotype asymmetry suggest that dysploid reduction is the major mechanism in Boronia karyotypes evolution.

TL;DR: The identity of three naviculoid diatoms originally described by Ehrenberg and now placed in the genus Placoneis was investigated and it was concluded that P.elginensis has been incorrectly applied to specimens of a second species, for which the name P. anglica was appropriate.

TL;DR: Identification of meristem activity and appreciation of varied ray manifestations are essential in understanding the ontogeny of stems in Amaranthaceae (which have recently been united with Chenopodiaceae).

TL;DR: Multivariate analysis of leaf radian measurements was used to investigate variation in leaf shape among 34 Asian species of the Uvaria group, a large palaeotropical group of climbing Annonaceae characterized by imbricate petals and stellate hairs.

TL;DR: The potential advantage of heavy seeds for subtidal seeds in search of safe sites is discussed, together with the merit of using the model to calculate the weight of other elliptical seeds within the Zosteraceae and other seagrass families.

TL;DR: This thesis deals with evolutionary relationships within the asterids, a group of plants comprising about one-third of all flowering plants, and identifies two new families: Pennantiaceae and Stemonuraceae, which were formerly included in Icacinaceae.

TL;DR: A new species A. leucantha, endemic to a small area with ophiolitic outcrops in West Macedonia, is described and previously considered a Greek endemic, is shown to be a heterotypic synonym of A. sartorii.

TL;DR: Examining the labellar micromorphology of five Brazilian species of Maxillaria assigned to the M. discolor alliance finds that the flowers of two of these species, namely M.violaceopunctata and M.villosa, produce both food hairs and a lipoidal, labellar secretion which is rich in aromatic amino acids, suggesting that pseudopollen gradually replaced nectar as the pollinator reward.

TL;DR: Melica is not a coherent taxonomic grouping and a simple segregation of Bromelica from Melica genus is rejected.

TL;DR: The data strongly support a repeated autoploid origin of the tetraploid cytotype which has been much more successful than the diploid progenitors in colonizing new land since the last ice age.

TL;DR: The species of Goniothalamus (Annonaceae) occurring in Peninsular Malaysia and Singapore are revised, updating the previous taxonomic treatment by James Sinclair, published in 1955, including a new species, G. tomentosus.

TL;DR: Variation in leaf structure and physiology between the species was associated with differences in shade-tolerance and water-use, and S. rubicundum is more shade-intolerant but more efficient in water- use than S.Âoperculatum, the most shade-Tolerant of all species.

TL;DR: The haploid and diploid chromosome numbers of 11 taxa of sect.