LANKESTERLANA8(2) 53-74 2008


NEW SPECIES AND RECORDS OF ORCHIDACEAE FROM COSTA RICA


 DIEGO BOGARi1',25, ADAM KARREMANS1,2 & FRANCO PUPULIN1-4

 1 Jardin Botanico Lankester, Universidad de Costa Rica, P O. Box 1031-7050 Cartago, Costa Rica.
 2 Centro de Investigaci6n en Orquideas de los Andes "Angel Andreetta", Universidad Alfredo Perez Guerrero,
 Extension Gualaceo, Ecuador.
 3Harvard University Herbaria, Cambridge, MA, USA.
 4 Marie Selby Botanical Gardens, Sarasota, FL, USA.
 SAuthor for correspondence: diego.bogarin@ucr.ac.cr


 ABSTRACT. We present and illustrate 11 new records of Orchidaceae from Costa Rica, and propose a new
 combination in Acianthera for Pleurothallis aberrans. Barbosella orbicularis and Myoxanthus speciosus,
 previously recorded from Costa Rica on the basis of doubtful vouchers, are confirmed to occur in the country
 and illustrated from Costa Rican vouchers. Warmingia margaritacea is reduced to the synonymy of Warmingia
 zamorana, a species previously known only from Ecuador. A new species, Epidendrum zunigae is described.
 This species is similar to E. guanacastense and E. isomerum, from which it differs by the narrow, lanceolate
 leaves, the greenish flowers, the apical half of the column purple with the clinandrium white, the sepals 11 mm
 long, and the creamy yellow, cordiform, acute, bicallose lip, which is somewhat convex in natural position.

 RESUMEN: Presentamos e ilustramos 11 nuevos registros de Orchidaceae para Costa Rica, y proponemos
 una nueva combinaci6n en Acianthera para Pleurothallis aberrans. Se confirm la presencia en el pais de
 Barbosella orbicularis y Myoxanthus speciosus, registradas anteriormente con base en registros dudosos, y
 las dos species se ilustran con material costarricense. Warmingia margaritacea se reduce a la sinonimia
 de Warmingia zamorana, una especie previamente conocida solamente del Ecuador. Se describe una nueva
 especie, Epidendrum zunigae. Esta especie es similar a E. guanacastense y E. isomerum, de los cuales difiere
 por las hojas estrechas, lanceoladas, las flores verduzcas, con la mitad apical de la column morada y el
 clinandrio blanco, los sepalos 11 mm de largo y el label cordiforme, agudo, bicalloso y amarillo crema, el
 cual es algo convexo en posici6n natural.

 KEY WORDS: Acianthera aberrans, Costa Rica, Epidendrum zunigae, floristics, new records, Orchidaceae,
 Warmingia zamorana.


 Despite its well established tradition in botanical
exploration, which started in 1846 with the visit of
Oersted (1846), Costa Rica is still far from having
a complete inventory of its orchidaceous flora. The
establishment of large and documented collections
of living plants at Lankester Botanical Garden,
associated with an increasing access to critical
documentation, have been the key to improve our
understanding of orchid diversity in Costa Rica.
 After the publication of the most recent and
complete treatment of the family by Dressler (2003)
new species have been added on a regular basis
to the country's inventory. As part of the general
activities of botanical exploration, documentation


and orchid identification carried out at Lankester
Botanical Garden, we present the following new
records for the flora of Costa Rica and a new
species:

1. Acianthera aberrans (Luer) Pupulin & Bogarin,
 comb. nov.
 Basionym: Pleurothallis aberrans Luer, Selbyana
 2(4): 382.1978. Type: Panama. Veraguas: epiphytic
 in tree north of the continental divide, alt. ca. 700
 m., above Santa F6, 6 September 1976, C. Luer
 & R.L. Dressier 1628 holotypee, SEL). Aberrantia
 aberrans (Luer) Luer, Monogr. Syst. Bot. Missouri
 Bot. Gard. 95: 253. 2004, nom. inval. Aberrantia