Cephalanthera pusilla (Hooker f.) Seidenfaden 1975

Cephalanthera pusilla was first described by Hooker f. (1890) as "curious, little plant" with the name Galeola pusilla. Hooker f. (1890) had only seen one specimen of this very rare plant, which was white-coloured in all parts and was therefore uncertain as to what was the right genus. Tang & Wang (1951) transferred the species to the genus Aphyllorchis. Seidenfaden (1975) brings all this together and finally follows that a translocation to Cephalanthera should be the accepted name (WCSP 2021). Seidenfaden (1975) also described C. exigua out of these confusions, from specimens found by Kerr in Laos, which were formerly confused with this species. Another close relative is the californian species C. austiniae, although this species occurs in South China and Myanmar (Burma) (POWO 2021).