]> [author note: Herbarium and types: orchids at SEL; additional material at AMES, BM, BR, C, DPU, EAP, G, GB, GH, LCU, MBG, MO, NY, PH, RM, TRT, US, UTC] [collector note: AMES, ARIZ, DS, F (orig.), GH, MEXU, MICH, MO, NY, PH, UC, US] [PJM: Needs validation. Found in database as author of Phymatidium melobarretoi, but without an agent entry] Botany Williams, Louis Otto Williams, Louis Otto L.O.Williams L. O. Williams Louis Otto Williams Williams, Louis O. Williams, Louis Otto et alia Williams, Louis 1908 1991