Published in Gayana Botanica, in 1990, in volume 47, pages 3-8

Published in Gayana Botanica, in 1990, in volume 47, pages 37-46

Published in Gayana Botanica, in 1990, in volume 47, pages 51-56

Published in Gayana Botanica, in 1990, in volume 47, pages 57-64

Published in Gayana Botanica, in 1990, in volume 47, pages 77-82

Published in Gayana Botanica, in 1990, in volume 47, pages 85-114

Published in Gayana Botanica, in 1990, in volume 47, pages 115-118

Published in Gayana Botanica, in 1990, in volume 47, pages 119-135

Published in Gayana Botanica, in 1990, in volume 47, issue 1-2, pages 9-36

Published in Gayana Botanica, in 1990, in volume 47, issue 1-2, pages 47-50

Published in Gayana Botanica, in 1990, in volume 47, issue 3-4, pages 71-76

Published in Gayana Botanica, in 1990, in volume 47, issue 3-4, pages 83-84