Showing papers in "Botanical Journal of the Linnean Society in 1974"

TL;DR: The chemotaxonomic data is consistent with the hypothesis that the Pomoideae are of allopolyploid origin, produced by ancient hybridization between primitive forms of the subfamilies Prunoideae and Spiraeoideae, although the possibility cannot completely be excluded that primitive Spiraeeideae only were involved.

TL;DR: The shape of the cotyledon lamina and a few other juvenile characters are studied for some 140 taxa of the cruciferous tribe Brassiceae and a diphyletic or polyphyletic origin for the genus Brassica becomes thinkable.

TL;DR: No direct correlation could be established between the areole size and the numbers of vein endings and tips per areole, and correlation was apparent between plants grouped according to their venation patterns and their habit.

TL;DR: Three taxa formerly regarded as species are reduced to subspecies of E. globulus through the use of a polythetic, agglomerative classificatory strategy and unpublished data on geographic variation strongly suggest that four subspecies should be recognized.

TL;DR: A detailed comparison of the vegetative and reproductive structures in Laurus nobilis and L. azorica is presented, finding that most of the characters used by authors to differentiate the two species show a marked degree of overlap.

TL;DR: It is argued that positional changes in the initiation of organs is an evolutionary process that may have remarkable effects on plant construction.

TL;DR: Chromosome counts are presented for 54 collections of Nigerian Compositae, which comprise 37 taxa belonging to 21 genera and 34 specieS, most of the taxa studied are colonisers of disturbed habitats.

TL;DR: A comparative account is given of the anatomy of 28 species, three varieties and one hybrid of the Central and South American genus Escallonia Mutis ex L.f. (classified variously in the Saxifragaceae, Escalloniaceae or Grossulariaceae).

TL;DR: Substantial evidence is provided to support the retention of Nelsonioideae as a subfamily of the Acanthaceae, rather than its transfer to the Scrophulariaceae.

TL;DR: The basic “R/iap/s-principle”, which characterizes woody monocotyledons, is here expressed in a distinctive way which can be seen as an important developmental variation.

TL;DR: The pattern of the vascular supply to the floral organs is very similar to that of the diandrous orchids, showing the undoubted affinity of the Apostasiaceae with the Orchidaceae.

TL;DR: The three investigated species of Cyperus L. Clarke show anatomical differences in the leaf pertaining to the number of vascular bundles and bundle sheaths, size of silica-cells and their wall thickness, while those of subgen.

TL;DR: In Ficus diversifolia, “mistletoe fig”, hydathodes are scattered over the leaf lamina and red pigment spots occur abaxially in the axils of major veins.

TL;DR: The pistils in Baeometra, Burchardia and Walleria ate tricarpellate, and their ovules are mostly bitegmic, and Tribal affinities of these genera are discussed.

TL;DR: Anatomical studies of representatives of 11 groups of species of the genus Euphorbia, erected on the basis of leaf venation patterns, reveal the occurrence of 3 main types of nodal organization, viz. unilacunar 1-trace, bilacUNar 2-trace and trilacUnar 3-trace (in the majority of the species).

TL;DR: The colony of Erica vagans in County Fermanagh, Northern Ireland was surveyed and soil and species association analyses were carried out as mentioned in this paper, where the species is found in a base-rich flush.

TL;DR: The development of the gametophyte of the fern Dryopteris thelypteris (L.) Gray was observed under sterile cultural conditions in order to recognize those features necessary for computer simulation of the thallus geometry.

TL;DR: The retention of Mendoncioidae and Thunbergioideae as subfamilies of the Acanthaceae is justified from the present investigation.

TL;DR: The stomata of Ginkgo biloba L. are haplocheilic and perigenous, as described and confirmed by Pant & Mehra in 1964, but there are several striking differences in the structure of the stomatal apparatus between their descriptions and the findings recorded in the present paper as mentioned in this paper.

TL;DR: Epidermal and cuticular characters of 30 taxa of Ephedra (including 24 species and six additional varieties) are described and their taxonomic value is discussed.

TL;DR: The Brazilian seaweeds studied by G. Dickie (1874) have been critically reviewed and several names corrected according to new taxonomic concepts.

TL;DR: The structure and distribution of transfusion tissue in the leaves of Cunninghamia lanceolata has been studied and appears to be distributed all round the vascular bundle and not only lateral to it as was reported in the earlier descriptions.