C. A. Luer

Systematics of Trichosalpinx (Icones Pleurothallidinarum)

Pleurothallis Subgenus Pleurothallis Sections Pleurothallis and Acroniae

Systematics of Brachionidium, and Addenda to Dresslerella, Platystele and Porroglossum (Orchidaceae) (Icones Pleurothallidinarum)

Systematics of Pleurothallis

Systematics of Draconanthes, Lepanthes subgenus Marsipanthes and subgenus Lepanthes of Ecuador ; Addenda to Brachionidium, Lepanthes subgen. Brachycladium, Platystele, Pleurothallis subgen. Aenigma and subgen. Ancipitia

Systematics of Restrepia (Orchidaceae)