Type species for the genus Crepidium Blume, Bijdr. 8: 387, f. (1825) is Crepidium rhedii. Blume.
You may use the following references:
1.Dockrill, A.W. (1992). Australian Indigenous Orchids. Volume 1 & 2. Surrey Beatty & Sons in association with The Society for Growing Australian Plants, Chipping Norton, NSW.
2. Clements, M.A. and Jones, D.L. (1996). Crepidium myosotis, a new species of Orchidaceae from Papua New Guinea. Lasianthera 1(1): 32-45.
Dr. Achankunju is correct. Type of genus Crepidium is C. rheedei Blume. In protologue (Bijdr. Fl. Ned. Ind. 8: 387. 1825) Blume described genus first and then species. The type locality is Java (grows in shady forests on Java island). Blume type specimens are held at L, some at BO, U and P. Blume described many species based on his own collections from Java. One isotype of C. rheedei is at BM (BM000082914). But At present from online record no type specimens of this species are extant at L, BO, U and P (better to check by contacting the curators of these herbaria). So, at present only one specimens collected by Blume is extant at BM, which is therefore the obligatory holotype.