Icones Pleurothallidinarum XXVII, Dryadella and Acronia section Macrophyllae-Fasciculatae, the 103rd volume of the Monographs in Systematic Botany from the Missouri Botanical Garden, continues Carlyle Luer's treatment within the Orchidaceae. Treated here are Dryadella and Acronia section Macrophyllae-Fasciculatae, in addition to nomenclatural addenda for Acianthera, Andinia, Dracula, Dresslerella, Lepanthes, Masdevallia, and Restrepia. Miscellaneous new taxa and combinations are also validated. More than 250 line drawings and a color frontispiece of Dryadella barrowii Luer illustrate this volume.