1. A review of the taxonomy of hawaiian pipturus (urticaceae) by anatomical and cytological evidence

   • Swat Nicharat
   • George W. Gillett

   OriginalPaper Pages: 191 - 206

2. The evolutionary implications of interspecific hybridization among four species of zinnia sect. Mendezia (compositae)

   • Omotoye Olorode

   OriginalPaper Pages: 207 - 216

3. The phylogeny of gutierrezia: An eclectic approach

   • Otto T. Solbrig

   OriginalPaper Pages: 217 - 229

4. Cuticular terminology in Russula (agaricales)

   • Robert L. Shaffer

   OriginalPaper Pages: 230 - 239

5. Chromosome numbers of dominican compositae

   • Andrew M. Torres
   • Alain H. Liogier

   OriginalPaper Pages: 240 - 245

6. A revision of tabebuia (bignoniaceae) in Central America

   • Alwyn H. Gentry

   OriginalPaper Pages: 246 - 264

7. New taxa and nomenclatural changes in arceuthobium (viscaceae)

   • Frank G. Hawksworth
   • Delbert Wiens

   OriginalPaper Pages: 265 - 269

8. The systematics of clarkia bottae, C. Cylindrica, and a related new species, C. Rostrata

   • W. S. Davis

   OriginalPaper Pages: 270 - 284

9. The classification society

   • Theodore J. Crovello

   Announcement Pages: 285 - 285