Published in Gayana Botanica, in 1989, in volume 46, pages 3-82
Published in Gayana Botanica, in 1989, in volume 46, pages 121-151
Published in Gayana Botanica, in 1989, in volume 46, pages 199-208
Published in Gayana Botanica, in 1989, in volume 46, pages 209-212
Published in Gayana Botanica, in 1989, in volume 46, pages 213-218
Published in Gayana Botanica, in 1989, in volume 46, issue 1-2, pages 83-88
Published in Gayana Botanica, in 1989, in volume 46, issue 1-2, pages 89-116
Published in Gayana Botanica, in 1989, in volume 46, issue 1-2, pages 117-120
Published in Gayana Botanica, in 1989, in volume 46, issue 3-4, pages 155-198