摘要：Four additions in the Orchidaceae family for Oaxaca, Mexico are reported in this work: Barkeria skinneri, Chysis limminghei, Habenaria macvaughiana, and Lepanthes vivipara . The presence of these species in Oaxaca is documented from specimens recently collected during floristic studies. For each species, information about synonyms, voucher specimens, distribution, habitat and comparison with morphologically similar taxa is provided. Also, for each species a photo and a map showing their new localities in Oaxaca are included. With the additions here reported the richness for orchids from Oaxaca rises to 733 taxa.
