A lithographic color plate from Ernst Haeckel's Kunstformen der Natur of 1899 showing an artist's depiction of different varieties of orchids:

1. Odontoglossum naevium = Odontoglossum naevium Lindl.
2. Oncidium kramerianum = Psychopsis krameriana (Rchb.f.) H.G.Jones
3. Odontoglossum ramosissimum = Cyrtochilum ramosissimum (Lindl.) Dalström
4. Odontoglossum schroederianum = Oncidium schroederianum (O'Brien) Garay & Stacy
5. Cattleya ballantiniana = Cattleya × ballantiniana Rchb.f. (C. trianae Linden & Rchb.f. × C. warscewiczii Rchb.f.)
6. Cattleya mendellii = Cattleya mendelii Dombrain
7. Cypripedium lemoinieri = Phragmipedium × sedenii (Rchb.f.) Rolfe (P. longifolium (Warsz. & Rchb.f.) Rolfe × P. schlimii (Linden ex Rchb.f.) Rolfe)
8. Cattleya rochellensis = Cattleya warscewiczii Rchb.f.
9. Cypripedium leeanum = Paphiopedilum insigne (Wall. ex Lindl.) Pfitzer × P. spicerianum (Rchb.f.) Pfitzer
10. Odontoglossum wattianum = Oncidium × wattianum (Rolfe) J.M.H.Shaw, Orchid Rev. 121 (1304, Suppl.): 77. (2013)
11. Cattleya labiata = Cattleya labiata
12. Epidendrum atropurpureum = Encyclia cordigera (Kunth) Dressler (1964)
13. Cypripedium argus = Paphiopedilum argus (Rchb.f.) Stein
14. Paphinia rugosa = Paphinia rugosa Rchb.f.
15. Zygopetalum xanthinum = Promenaea xanthina (Lindl.) Lindl.
16. Oncidium laxense = Oncidium loxense Lindl. / Cyrtochilum loxense (Lindl.) Kraenzl.