Showing papers in "Botanical Journal of the Linnean Society in 1975"

TL;DR: It is concluded that the Proteaceae has no close relatives, although it possibly diverged early from the Rosiflorean line, and its members were probably trees of mesothermic closed forests.

TL;DR: Lichens employ two divergent strategies of reproduction, a sexual method through spore propagation and a derivative asexual strategy based on systems perpetuating the symbiosis by the dissemination of specialized diaspores, which represents a gradient in the evolution of taxa.

TL;DR: A comprehensive review of the taxonomy of the genus Prorocentrum has been carried out for the first time since Schiller's monograph of 1933-7, and it is proposed to reduce the number of species from 64 to 21, which fall into five fairly distinct groups.

TL;DR: The structure and development of roots and haustoria in 37 species of parasitic Scrophulariaceae was studied using light microscopy, finding that early stages in the development of the haustorium are exogenous.

TL;DR: In Hypericum, the unique occurrence of distyly in H. aegypticum, H. aciferum and H. russeggeri, the three species comprising section Adenotrias, and the derivative nature of these species within the genus indicate that heterostyly has evolved within this genus and is not a primitive trait.

TL;DR: This study has shown for the first time that the middle layer (or layers) of the outer integument is of subdermal derivation in at least some taxa of the Cruciferae.

TL;DR: The presence of an operculum and the recognition of a coleoptile and mesocotyl similar to those of grasses and sedges gave grounds for including Nymphaeaceae in the monocotyledons.

TL;DR: It appears that pollution has only a minimal effect on species diversity on open coasts where there is good water circulation, and there has been only an estimated 16.6% reduction in common species over the past century.

TL;DR: The cytological pattern of the subgenera in Morton's classification indicates how an improved classification of these species, recognizing fewer genera, might eventually be achieved.

TL;DR: For African and Madagascan Loranthaceae, the base chromosome number of all genera studied is χ= 9 as discussed by the authors, which is the same as the base number for all other families of the Lorantheae.

TL;DR: Leaf anatomy does not provide immediate clues toward elucidating the relationships of cunoniaceous genera, but characters of the lamina that show variation and are useful in generic delimitation are: trichome type, presence of a hypodermis, occurrence of mucilaginous cells, and mature stomatal types.

TL;DR: If recent discoveries of Glossopteris fructifications are accepted as pro-angiosperms, it is shown that some anomalies in the vascular supply to the androecium in the Proteaceae can be accounted for.

TL;DR: A discussion of chromosome architecture in Gibasis in relation to the taxonomy of the genus concludes the paper, where the basic number appears to be x= 6 but two karyotype patterns have been found.

TL;DR: The affinities of the Angolan marine algal flora are overwhelmingly with the Gulf of Guinea flora; there is a small but distinct transitional element, such as Plocamium beckeri, P. suhrii and Acrosorium maculatum, confined to localities in the south of Angola.

TL;DR: The pistils of the Glorioseae (Gloriosa, Littonia, Sandersonia) are generally tricarpellate and alike; they have many ovules, some of which are barely bitegmic, with inner integuments often nearly fused with nucellar remnants.

TL;DR: A detailed anatomical study of two species of Argyreia, viz.

TL;DR: One important nomenclatural aspect of this synthesis stems from the delimitation of the genus Centaurea, on the basis of flower and fruit.

TL;DR: The sequence of primordial initiation is acropetal and the primordia develop in the same order in which they appear, and the placentation in Justicia is parietal ontogenetically as well as anatomically.

TL;DR: In the genus Jovetia, many outer cells from the multiseriate epidermis develop into hairs while at the same time differentiating as sclereids.

TL;DR: Five of the nine species of Grammitis recorded from eastern Australia are new; G. reinwardtii is recorded for the first time in Australia; Polypodium albosetosum Bailey is reinstated as a species distinct from G. ciliata Colenso of New Zealand.

TL;DR: Serological comparisons of the seed proteins of Flagellaria indica L., Joinvillea bomeensis Becc.