Sex expression in EgyptianThymelaea hirsuta (Thymelaeaceae) populations K. H. ShaltoutA. A. El-Keblawy OriginalPaper Pages: 133 - 141
Hybrid speciation and radiation in the neotropical woody genusTocoyena (Rubiaceae) I. Silberbauer-GottsbergerG. GottsbergerF. Ehrendorfer OriginalPaper Pages: 143 - 169
Phenetic, biogeographical, and evolutionary study ofOrnithogalum subg.Heliocharmos (Hyacinthaceae) in the western Mediterranean basin J. MoretNicole Galland OriginalPaper Pages: 179 - 202
Geographic structuring of chloroplast DNA genotypes inTiarella trifoliata (Saxifragaceae) D. E. SoltisP. S. SoltisT. L. Tucker OriginalPaper Pages: 203 - 216
Two new species of the diatom genusChaetoceros (Bacillariophyta) David U. Hernández-Becerril OriginalPaper Pages: 217 - 226
Electron microscopical studies ofThorea ramosissima (Thoreaceae, Rhodophyta): Taxonomic implications ofThorea pit plug ultrastructure E. Schnepf OriginalPaper Pages: 233 - 244
A numerical approach to pollen sculpture terminology Edward L. VezeyVarsha P. ShahJohn J. Skvarla OriginalPaper Pages: 245 - 254
A new combination and a new species in the lichen genusCatapyrenium (lichenizedAscomycetes, Verrucariaceae) Othmar BreussJavier Etayo OriginalPaper Pages: 255 - 260
Tetrastylis ovalis: A second case of bat-pollinated passionflower (Passifloraceae) Silvana BuzatoAndréa L. M. Franco OriginalPaper Pages: 261 - 267