Showing papers in "Botanical Journal of the Linnean Society in 1972"

TL;DR: In this present survey the information is presented within the framework of a tentative classification of genera proposed by Brenan, and comments are made throughout on the relevance of cytology to his taxonomic treatment of the family.

TL;DR: Evidence presented indicates that an antheridogen causes the existence of two gametophyte types, while one or more cytoplasmic units are the probable cause of the sex ratio.

TL;DR: Despite the capability for producing completely homozygous genotypes by intragametophytic self-fertilization, ferns in natural populations seem to retain considerable genetic loads of deleterious recessive alleles.

TL;DR: Generic pollen descriptions for an additional 12 genera and 18 species of Annonaceae are included, laying the foundation for a generic reclassification and natural phylogeny of the family based largely on comparative palynology.

TL;DR: The sporocarp wall is thicker and the spores within it are larger than hitherto described, and the mode of sorus attachment is similar to that of Marsilea rather than Regnellidium, helping in reconsidering the position of Rodeites in the Marsileaceae.

TL;DR: Lens montbretii has a diploid chromosome number which, combined with morphological characteristics which distinguish it from other species of Lens, are considered to be an adequate basis for the returning of the taxon to the genus Vicia as V. mont bretii Fisch.

TL;DR: Antheridia and archegonia of Mnium hornum are produced according to an endogenous rhythm that approximates to an annual cycle and it is suggested that the effect of short days in winter is to preserve its co-ordination with the seasons.

TL;DR: Sibling karyotypes were found to be invariable, but extensive karyotypic variation was found between samples, even intraspecifically, and eight species exhibited regular chromosome sets, the remainder being irregular.

TL;DR: The morphology and anatomy of Synsepalum dulcificum has been described, principally because of enquiries from pharmaceutical industries considering this species as a potential replacement of the sweetening agent cyclamate.

TL;DR: The structure of the carpel has been studied in flowers of the Neodregeae (Dipidax and NeodRegea) and found that all the NeODregea have monotegmic ovules.

TL;DR: In a survey of the Leguminosae, calcium oxalate crystals were found in tapetal cells in all three subfamilies and included the first report of styloid crystals in the Caesalpinioideae.

TL;DR: An account of 13 taxa in the genus Enteromorpha occurring on the shores of the mainland of India is given and of these, one is a new species and another, E. linza var.

TL;DR: The records, which arise out of collections and observations made between 1961 and 1971, include 56 species not hitherto recorded, 17 previously recorded under different names and for which a revision of nomenclature seemed necessary, and 33 species with new distributional data within the study area.

TL;DR: Sections Naevosa M. P. Chr.