Pupulin, F. 2007. Contributions toward a reassessment of Costa Rican Zygopetalinae (Orchidaceae). 3. A systematic revision of Dichaea in Costa Rica. Harvard Pap. Bot. 12(1): 15—153.

Abstract. Asystematic revision of the genus Dichaea (Orchidaceae) in Costa Rica is presented. The taxonomic history of the genus and its phylogenetic position are discussed, with emphasis on infrageneric grouping. Characters of vegetative and floral morphology are treated, and their taxonomic significance is discussed. Twenty-nine Dichaea taxa are recognized for the flora of Costa Rica, and a key to species is provided. Each taxon is described on the basis of Costa Rican material, illustrated in a composite plate, and its distribution in the country is assessed. Distribution maps for all the taxa are given. Overall distribution, derivation of name, notes on species ecology, and diagnostic features are presented for each taxon. Lectotypes are selected for D. acostae Schltr., D. acroblephara Schltr., D. amparoana Schltr., D. costaricensis Schltr., D. dammeriana Kraenzl., D. lycopodioides Rchb.f. ex Kraenzl., D. poicillantha Schltr., D. selaginella Schltr., D. tuerckheimii Schltr., Epidendrum echinocarpon Sw., and E. trichocarpon Sw. A new species, D. gomez-lauritoi, is described and illustrated from the wet Caribbean plains of central Costa Rica.

Key words: Orchidaceae, Zygopetalinae, Dichaea, Epidendrum, Costa Rica

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Pupulin, F. 2009. Typi Swartziani Orchidacearum Indiae Occidentalis in Herbario Vindobonense conservandi. Ann. Naturhist. Mus. Wien 110 B: 213—247.

Abstract. A leading authority in the taxonomy of the Orchidaceae, Olof SWARTZ contributed a large number of taxa new to the science from his journey to the Caribbean in 1784–1786. Most of Swartz‘s collections are kept at the Regnellian Herbarium (part of Swedish Museum of Natural History), but duplicates of the materials he collected in the West Indies may be found today in several European herbaria, including the herbarium of Joseph Banks (now at the Brithish Museum), the herbarium of the Bergius Foundation in Stockholm, the Carl Peter Thunberg herbarium at the Uppsala University, and the herbarium of the Botanical Garden & Museum of the Natural History Museum of Denmark, University of Copenhagen. Less known is the rich collection of 'Swartz' type specimens conserved at the Naturhistorisches Museum in Vienna, which are incorporated in the herbarium of Heinrich Gustav Reichenbach. In view of the importance of historic type material to provide nomenclature stability, mainly for what concerns old binomials, and the ongoing effort to form a register of all the Caribbean taxa published by Swartz, an annotated catalogue of 'Swartz' type material at W is presented. The quality of the material at W is mostly outstanding, and it is important for taxonomists working on the Caribbean, and in general with the Neotropical orchid flora, to take in consideration W in their search for original Swartz specimens. Forty-four sheets corresponding to 41 species originally described by Swartz on the basis of West Indian collections are included in the catalogue, 43 of which are isotypes and one a drawing of type. Other drawings by Swartz, mounted on the specimen sheets, are also annotated in the catalogue. Homotypic synomyms based on 'Swartz' names are listed, together with the currently accepted nomenclature for each taxon.

Key words: Olof Swartz; Herbarium Naturhistorisches Museum Wien; Orchidaceae, types.

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