https://www.orchidweb.com/p/tropical-slipper-orchids-paphiopedilum-and-phragmipedium-species-and-hybrids-book-by-harold-koopowitz
Tropical Slipper Orchids - Paphiopedilum and Phragmipedium Species and Hybrids - Book by Harold...
Distinguished by a prominent slipper-shaped lip and often decorated with warts, hairs, or stripes, the curious flowers of slipper orchids have captivated...
slipper orchidsbook bytropicalpaphiopedilum