The present paper deals with a detailed study of the venation, soral shape and distribution,
and frondshape of the microsorioid Polypodiaceae, including taxa generally referred to the …

Usually terrestrial or epiphytic, sometimes epilithic, usually small to medium-sized, sometimes
large ferns with short- to long-creeping stem bearing basifixed, pseudopeltate or peltate, …

In his introductory statements to 'The Symposium on the Phylogeny and Classification of the
Filicopsida' which was held in London, 1972, HOLTTUM, when dealing with 'dubious groups …

Terrestrial or epilithic, occasionally scandent, rarely epiphytic ferns of small to large size.
Stem creeping, erect, or scandent, radially dictyostelic, scaly. Petioles aggregated to remote, …

The present study deals with systematic and taxonomic problems in the acrostichoid fern
genus Bolbitis (Lomariopsidaceae). The idea came from Prof. Holttum, Kew, in view of his …

The stomata as occurring on the fronds of the sporophytes of a large number of Polypodiaceae
ss (Filicales) are investigated. A number of different stomatal types is recognised, (newly) …

The rhizomes of all species in the fern genus Lecanopteris Reinw. contain galleries (hollow
chambers) that serve as domatia (homes) for ants. Some aspects of the biology of these …

Rhizome creeping or low-climbing (Bolbitis) or climbing ( Lomariopsis, etc.) or epiphytic (Elaphoglossum),
dorsiventral, with a broad ventral vascular strand which supplies the roots and …

The taxa formerly referred to Drymoglossum and Saxiglossum are part of Pyrrosia. Of these
6 species the taxonomy is given and the phylogenetic relationships discussed. One …

During a collecting trip to Thailand, as a member of the Thai-Dutch botanical expedition
1965/1966, I was struck by the excessive amount of mucilage sometimes present on the …