Orchids (Orchidae)
Lithograph, by Ernst Haeckel, published 1904

1. Odontoglossum naevium (Odontoglossum naevium)
2. Oncidium kramerianum (Psychopsis krameriana)
3. Odontoglossum ramosissimum (Cyrtochilum ramosissimum)
4. Odontoglossum schroederianum (Oncidium schroederianum)
5. Cattleya ballanthiniana (Cattleya × ballantiniana) (C. trianae) (C. warscewiczii)
6. Cattleya mendellii (Cattleya mendelii)
7. Cypripedium lemoinieri (Phragmipedium × sedenii) (P. longifolium) (P. schlimii)
8. Cattleya rochellensis (Cattleya warscewiczii)
9. Cypripedium leeanum (Paphiopedilum insigne) (P. spicerianum)
10. Odontoglossum wattianum (Oncidium × wattianum)
11. Cattleya labiata (Cattleya labiata)
12. Epidendrum atropurpureum (Encyclia cordigera)
13. Cypripedium argus (Paphiopedilum argus)
14. Paphinia rugosa (Paphinia rugosa)
15. Zygopetalum xanthinum (Promenaea xanthina)
16. Oncidium laxense (Oncidium loxense/Cyrtochilum loxense)