Published in Gayana Botanica, in 1993, in volume 50, pages 5-9

Published in Gayana Botanica, in 1993, in volume 50, pages 11-16

Published in Gayana Botanica, in 1993, in volume 50, pages 17-28

Published in Gayana Botanica, in 1993, in volume 50, pages 29-40

Published in Gayana Botanica, in 1993, in volume 50, pages 41-45

Published in Gayana Botanica, in 1993, in volume 50, pages 51-55

Published in Gayana Botanica, in 1993, in volume 50, pages 57-65

Published in Gayana Botanica, in 1993, in volume 50, pages 67-68

Published in Gayana Botanica, in 1993, in volume 50, pages 69-102

Published in Gayana Botanica, in 1993, in volume 50, pages 103-110