Population variability in the genusTrichocereus (Cactaceae) in central Chile Philip W. Rundel OriginalPaper Pages: 1 - 9
Ophrys helenae (Orchidaceae), eine lange verkannte Sippe der Balkanhalbinsel Othmar DaneschEdeltraud Danesch OriginalPaper Pages: 11 - 22
Different patterns of callose wall formation during megasporogenesis in two species ofOenothera (Onagraceae) Inés Noher de HalacCornelia Harte OriginalPaper Pages: 23 - 38
Zur Morphologie und Entwicklungsgeschichte vonEunotia-Arten (Bacillariophyceae) Lothar Geitler OriginalPaper Pages: 39 - 43
Host plants of someRhinanthoideae (Scrophulariaceae) of eastern North America Lytton J. MusselmanWilliam F. Mann Jr. OriginalPaper Pages: 45 - 53