Systematics of Pleurothallis : subgen. Pleurothallis, sect. Pleurothallis, subsect. Antenniferae, subsect. Longiracemosae, subsect. Macrophyllae-Racemosae, subsect. Perplexae, subgen. Pseudostelis, subgen. Acuminatia : addenda to Dracula, Lepanthes, Masdevallia and Pleurothallis, miscellaneous new species of Dryadella, Lepanthes and Pleurothallis - Luer, Carlyle August 1922-2019 (Missouri Botanical Garden, 1999)