Showing papers in "Botanical Journal of the Linnean Society in 1970"

TL;DR: The structure of the theca of some 30 marine and freshwater members of the Dinophyceae has been examined by light and electron microscopy and it is suggested that the thecal types could from the basis for some revision of the taxonomy of the class.

TL;DR: In all, 80 species and varieties of marine algae are recorded from the intertidal region of the Visakhapatnam coast, 18 of which are new records for India and seven are first records for the east coast.

TL;DR: In Empetrum, the flavonoids differ modally in the three species usually accepted, thus confirming data on fruit colour and breeding systems, and suggesting that the genus comprises one species with about three subspecies at diploid and tetraploid levels.

TL;DR: Scanning electron microscopy has been used to examine the surface architecture of the pits in the walls of vessels, vasicentric and fibre tracheids, and parenchyma cells, which make up the wood of Eucalyptus regnans, to propose a hypothesis which relates vesture formation to prolongation of the activity of the protoplast in pits as the cells die.

TL;DR: The morphology of the spores and prothalli of Arachniodes aristata, A. assamica, Cyrtomium caryotideum, C. falcatum and 10 species of Polystichum is described and sex organs are of the common leptosporangiate type.

TL;DR: The introduction contains a historical account of the discovery and treatment of these species and an account of their morphology, breeding biology, parasitism and species concept.

TL;DR: This is the first demonstration of autoploid derivation in the genus Adiantum, and one ecologically differentiated allotetraploid has been collected from Tanganyika and the pairing behaviour of its chromosomes analysed in a range of crosses involving oriental and African cytotypes.

TL;DR: The detailed anatomy of Yucca glauca leaf, a potential source of medicinally useful steroid precursors, is described and the most useful diagnostic features are papillose epidermal cells, large acicular crystals of calcium oxalate, partially lignified fibres and cells from the modified leaf margins.

TL;DR: The present results indicate that 2n= 62 is widespread in north-eastern North American S. alterniflora, and no other chromosome number has been found in a survey of the region, and the species is wide-ranging and the possibility of2n= 60 occurring in other areas, especially in the south of its range, cannot be ruled out.

TL;DR: The observations indicate that the leaves of Garrya show several anatomical features which are unknown or rare in the Cornaceae, the family in which it has been included many times, and these characters support the separation of GarryA from the Corn Families and the retention of the family Garryaceae.

TL;DR: It is evident that A. tenuicaulis originated in South America, and it is concluded that this species occupies an isolated position in sect.

TL;DR: A preliminary investigation of six species of Freycinetia from the Solomon Islands indicates that the anatomy of this genus is relatively uniform, and differs only in degree rather than fundamental distinction from that of Pandanus.

TL;DR: The flower pigments of Symplocarpus foetidus (L.) Nutt.

TL;DR: Scapania calcicola is reported here as being widespread on calcareous mica schist and basalt rocks in Scotland and the taxonomic features distinguishing it from S. aequiloba are critically assessed.

TL;DR: Observations concerning dehiscence and the structure of living zoospores, previously unknown, have been made and resting spores are described for the first time.

TL;DR: Comparison of the principal characters of the leaves of various S. andigenum varieties showed that the majority of them have a strong degree of dissection, a considerable distance between the adjacent leaf lobes and mostly ovate lobes with long rachidules.