págs. 61-137
Studies in Oberonia, 9: lessons from excess names in oberonia for Orchidaceae systematics, including a revision of the Oberonia sect. Scytoxiphium
págs. 139-156
Rudolf Schlechter's South-American orchids IV. Schlechter's ''network'': Venezuela and Colombia
págs. 157-233
Rudolf Schlechter's South-American orchids V. Schlechter's ''network'': Ecuador and Peru
págs. 235-268
A new and previously misidentified species of Trisetella (Pleurothallidinae: Orchidaceae) from southeast Ecuador
págs. 269-276
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