1. The tapetum: Its form, function, and possible phylogeny inEmbryophyta

   • Ettore Pacini
   • G. G. Franchi
   • Michael Hesse

   OriginalPaper Pages: 155 - 185

2. Community studies in pollination ecology in the high temperate Andes of central Chile II. effect of temperature on visitation rates and pollination possibilities

   • Mary T. Kalin Arroyo
   • Juan J. Armesto
   • Richard B. Primack

   OriginalPaper Pages: 187 - 203

3. Distinctions betweenHordeum bulbosum andH. murinum s.l. in seed and herbarium collections

   • B. R. Baum
   • L. G. Bailey

   OriginalPaper Pages: 205 - 210

4. Scanning electron microscopy of pollen grains of some species of the genusArum (Araceae)

   • Marija Bedalov

   OriginalPaper Pages: 211 - 216

5. A cladistic evaluation of the lower and higher green plants (Viridiplantae)

   • Hans J. Sluiman

   OriginalPaper Pages: 217 - 232

6. Further flavonoid studies onAttalea species and some related cocosoid palms

   • Christine A. Williams
   • Jeffrey B. Harborne
   • Sidney F. Glassman

   OriginalPaper Pages: 233 - 239

7. Hybridization and speciation in the genusDryopteris (Pteridophyta:Dryopteridaceae) on Pico Island in the Azores

   • Mary Gibby

   OriginalPaper Pages: 241 - 252

8. Chemotaxonomical investigations of the generaBlackstonia andCentaurium (Gentianaceae)

   • W. G. van der Sluis

   OriginalPaper Pages: 253 - 286

9. Pollenfertility and seed formation in theOrnithogalum umbellatum/angustifolium complex (Liliaceae/Scilloideae)

   • L. W. D. van Raamsdonk

   OriginalPaper Pages: 287 - 297

10. Comparative fecundity of morphs in a mixed monoclinous-andromonoecious population ofWurmbea dioica subsp.alba (Liliaceae) in Western Australia

    • Robert Ornduff

    OriginalPaper Pages: 299 - 302

11. The application and citation of the generic nameParmeliopsis (Lecanorales, Parmeliaceae)

    • David L. Hawksworth

    Short Communication Pages: 303 - 307