Joseph Arditti (born 1932), American plant physiologist specializing in orchids. Doctorate from the University of Southern California, 1965. Professor of Biology University of California, Irvine, 1966-2001. Professor Emeritus, 2001-
Ray Barkalow (born 1952), US scientist and engineer, known for using science to explain or dispel orchid-growing myths.
Alex Drum Hawkes (1927–1977), American botanist and cookbook author from Coconut Grove, Florida and Kingston, Jamaica; specialized in orchids, bromeliads, palm trees, ferns, vegetables and fruits
Abel Aken Hunter (1877–1936), American botanist in Panama
Adam P. Karremans (born 1986), Dutch-Costa Rican botanist specialised in phylogenetics and systematics of Neotropical Orchidaceae
Charles H. Lankester[es] (1879–1969), British born, known for his orchid work in Costa Rica
Carlos Adolfo Lehnebach (born 1974), Chilean born botanist. Moved to New Zealand in 2000. Research interests are pollination, taxonomy and conservation of New Zealand orchids. His collections are stored at the WELT herbarium (Museum of New Zealand Te Papa Tongarewa)
Jean Jules Linden (1817–1898), Belgian botanist and explorer, horticulturist and businessman, specialising in orchids
Theodore Luqueer Mead (1852–1936), American naturalist, entomologist and horticulturist known for his pioneering work on the growing and cross-breeding of orchids
Louis-Marie Aubert du Petit-Thouars (1758–1831), French botanist known for his work collecting and describing orchids from the three islands of Madagascar, Mauritius and Réunion