Willdenowia 38
Willdenowia – Annals of the Botanic Garden and
Botanical Museum Berlin-Dahlem
ISSN 0511-9618
© 2008 BGBM Berlin-Dahlem.
Pupulin, F. & Merino, G.: Two new species of Kefersteinia (Orchidaceae: Zygopetalinae).
Willdenowia 38: 187-193.
doi:10.3372/wi.38.38113
Abstract
Two 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.
Additional key words
orchids, Kefersteinia medinae, Kefersteinia saccata, Costa Rica, Ecuador, taxonomy.
