Species crosses in Helianthus: I. Diploid species C. B. HeiserWm. C. MartinD. M. Smith OriginalPaper Pages: 137 - 147
The Andean genus Niphogeton (Umbelliferae) revisited Mildred E. MathiasLincoln Constance OriginalPaper Pages: 148 - 155
Fuscoboletinus, a new genus of the Boletales René PomerleauAlexander H. Smith OriginalPaper Pages: 156 - 172
New coreopsidevae from Mexico and the United States Earl Edward Sherff OriginalPaper Pages: 172 - 173
Systematic position of Cnidoscolus and Jatropha Kim I. MillerGrady L. Webster OriginalPaper Pages: 174 - 180
Metaplexis japonica: An oriental milkweed from an Iowa cornfield Stanley L. WelshDennis E. Anderson OriginalPaper Pages: 186 - 188
Revision of martiodendron (Cassieae, Caesalpiniaceae) Robert KoeppenHugh H. Iltis OriginalPaper Pages: 191 - 209