Published in Fieldiana: Botany, New Series, in 1991, in volume 26, pages 1-70
Published in Fieldiana Botany, in 1991, in volume 27, pages 1-176
Published in Fieldiana: Botany, New Series, in 1991, in volume 27, pages 42-46
Published in Fieldiana: Botany, New Series, in 1991, in volume 27, pages 55-57
Published in Fieldiana: Botany, New Series, in 1991, in volume 27, pages 111-166
Published in Fieldiana: Botany, New Series, in 1991, in volume 27, pages 167-170
Published in Fieldiana Botany, in 1991, in volume 28, pages 1-43