01183nas a2200145   4500008004100000022001400041245006600055210006200121300001200183490000700195520075600202100002000958700002100978856003800999       2008                        eng d  a0511-961800aTwo new species of Kefersteinia (Orchidaceae : Zygopetalinae)0 aTwo new species of Kefersteinia Orchidaceae Zygopetalinae  a187-1930 v383 aTwo new species of the genus Kefersteinia, K. saccata and K. medinae, are described and illustrated from Costa Rica and Ecuador, respectively. K. saccata has apparently no close relatives; among the species with truly cylindric-umbonate callus, it is compared with K. retanae and K. wercklei, from which it differs in the porrect petals, the saccate, ovate-subrhombic lip, shorter than the column, and the obreniform basal callus. K. medinae belongs to a group of species of mainly Central American distribution, ranging southward to Ecuador. It differs from its closest relative, K. costaricensis, by the,lateral almost horizontal sepals, the immaculate sepals and petals, and the distinctly obovate, truncate lip, provided with a triangular apicule.1 aPupulin, Franco1 aMerino, Gilberto  u<Go to ISI>://BCI:BCI200800677973