A survey of the orchids found at the "Santa Cruz" Hills, Municipalities of Corumbá and Ladário, Mato Grosso do Sul State, Brazil was carried out. Collections were achieved weekly from January to October, 1999, trying to cover different altitudes in that parts of the hills with vegetation still preserved. The herbarium materials were housed at herbarium COR with duplicates at CPAP, and SP. Twenty one orchid species belonging to 19 genera were found. Seven are terrestrial - Aspidogyne longicornu, Cyrtopodium virescens, Epistephium sclerophyllum, Habenaria juruenensis, Habenaria polycarpa, Oeceoclades maculata, and Sarcoglottis curvisepala -, one hemiepiphytic - Vanilla palmarum -,and the remaining are holoepiphytic - Acianthera pubescens, Alatiglossum macropetalum, Campylocentrum hasslerianum, Cattleya nobilior, Encyclia conchaechila, Epidendrum coronatum, Epidendrum densiflorum, Isochilus linearis, Lophiarismorenoi, Octomeria warmingii, Polystachya concreta, Sophronitis cernua, and Xylobium foveatum. Identification key, descriptions of examined materials and illustrations were provided.
Mato Grosso do Sul; Orchidaceae; orchids; Santa Cruz Hills
