Joanna Mytnik

Gdansk University of Technology

Polystachya is a large, pantropical orchid genus of 200 species, most of which occur as epiphytes in sub-saharan Africa. The three-lobed labellum of most Polystachya species possesses a fleshy callus and various types of trichomes and papillae. In this paper, we present the results of micromorphological studies on the labellum of 20 species, repres...

A new species from Madagascar, Lesliegraecum elzbietae Mytnik,Szlach. & Olędrz. (Orchidaceae, Angraecinae) is described and illustrated. Morphological description is complemented with data of the species ecology and distribution. The taxonomic affinities of the new taxon are discussed and key to determination of all Lesliegraecum representatives is...

Three plastid regions, matK, rpl32-trnL and rpl16 intron and the ITS1-5.8S-ITS2 nuclear ribosomal DNA were used to demonstrate a phylogenetic placement of the genus Hederorkis (Orchidaceae) for the first time. The taxonomic position of this genus has been unclear thus far. The phylogenetic and morphological relations of Hederorkis to the most close...

Title page and table of contents to download here. The book is available at Koeltz Scientific Books: http://koeltz.com/product.aspx?pid=200778

Descriptions, brief taxonomic notes, and data on the ecology of the Colombian Myrosmodes species as well as a key for determination of all species known from the northern Andes are provided. The descriptions are complemented by illustrations and maps of their distributions.

Since the description of the Neotropical genus Vargasiella in 1952, its taxonomic position has remained unclear, mainly due to a lack of sufficient data. In this study, the taxonomic position of Vargasiella was revised based on the outcomes of macro- and micromorphological studies, analyses of selected molecular markers and ecological methods of ni...

Eight new species of the genus Gomphichis from Colombia are described. Each species is illustrated, and detailed habitat and distribution data are provided. A distribution map of the new species is presented. A dichotomous key for determination of the Gomphichis species in northern South America is provided. Conservation status assessments are prov...

A new species of Altensteinia Kunth, probably endemic to the Colombian Andes, is described, illustrated and discussed, with notes on its habitat and altitude. A dichotomous key for determination of Altensteinia species in Colombia is provided. This article is available in PDF format at Polish Botanical Journal website: http://botany.pl/ibwyd/pol-b...

In Colombia, four species of Triphora (Orchidaceae) are recognized. Two species (Triphora galeanoi and T. vichadaensis) are newly described. As circumscribed here, the two new species occur exclusively in Colombia apart from T. foldatsii, being known from Colombia and Venezuela, and T. gentianoides, ranging from the USA (Florida) in the north to Co...

Als Resultat morphologi-scher Studien bei Herbarbelegen der Gattung Epistephium (Orchidaceae, Vanilloideae) wurden drei neue ko-lumbianische Arten entdeckt. Epis. rhombilabium Szlach., Mytnik & Baranow, Epis. trianae Szlach., Mytnik & Baranow und Epis. araracuarae Szlach., Mytnik & Baranow werden illustriert und mit Angaben zu Habitat und Verbrei-t...

Polystachya section Superpositae is a group of montane and submontane African epiphytes with thirteen species (including the newly described in this paper). During a scientific expedition to Bamenda Highland, Cameroon a new species, Polystachya bamendae, was found and it is described here. The new entity was com-pared with 398 herbarium specimens r...

The morphological study of the herbarium material representing Epistephium (Orchidaceae, Vanilloideae) led to the discovery of two groups of specimens that significantly differ from all known species of the genus. The results of literature data study and of comparative analysis of those and other specimens suggest that these collections represent n...

Results of molecular analysis compared with morphological studies were used for reclassification of the Angraecumalliance (Orchidaceae). For the purpose of this study we sequenced the ITS region (ITS1-5.8S-ITS2) of nrDNA representing nuclear genome and the plastid region trnL-F (including intron of trnL gene and trnL-trnF intergenic spacer). The IT...

The present study is based on herbarium materials and field expeditions carried out by Szlachetko in 1997 and 1999. Total number of specimens revised was about 4500. The keys for taxa determination are dichotomous. Subfamilies, tribes and subtribes are placed in the taxonomic order (Szlachetko 1995 with later changes by Slachetko & Rutkowski 2000,...

Three new species of the Andean genus, Myrosmodes, are described, Myrosmodes cleefi Szlach., Mytnik & S.Nowak, Myrosmodes reticulata Szlach., Mytnik & S.Nowak and Myrosmodes subnivalis Szlach., Mytnik & S.Nowak. The first two species are known from a single population each, form Columbia, the last one from Columbia and Ecuador. Each species is desc...

A new classification of the subtribe Maxillariinae (Orchidaceae) is proposed. The Camaridium-group is divided into seven genera, Adamanthus Szlach., Camaridium Lindl., Pseudomaxillaria Hoehne, Psittacoglossum Lex. in La Llave & Lexarza. and three described here: Chaseopsis Szlach. & Sitko, Chelyella Szlach. & Sitko, Viracocha Szlach. & Sitko. Ornit...

Index of orchid names published in the orchid flora of French Guiana (Szlachetko et al. 2012. Orchids of French Gujana)

In Guatemala 56 species of Spiranthinae s.l. (Orchidaceae) are recognized. They are currently assigned to three subtribes, Spiranthinae, Stenorrhynchidinae, and Cyclopogoninae. The drawings and keys to the species of the three subtribes are presented in this paper. In previous part for each species treated a synonymy, brief description of flower st...

In 2006 Szlachetko and co-authors described a new genus Takulumena (Epidendroideae, Epidendrinae) including two species T. vazquezii and T. sophronitoides. This genus is closely related to Epidendrum, from which it is easily distinguishable by the monopodial type of growth and the basal many-flowered inflorescences, continuesly growing. Three new s...

The Polystachyinae is an orchid subtribe with a pantropical distribution. It occurs from southern North America and tropical and subtropical South America, throughout tropical and subtropical Africa, Madagascar and the neighbouring islands, to south-eastern tropical Asia. Ten genera and 232 species are recognized within the Polystachyinae based on...

New section for five Malagasy species of Polystachya (P. oreocharis, P. humbertii, P. rosellata, P. tsinjoarivensis, P cornigera in two variety) is proposed. Full descriptions, illustrations, distribution maps and key to the species are presented. More info: https://www.researchgate.net/publication/254864247_A_MONOGRAPH_OF_THE_SUBTRIBE_POLYSTACHYI...

New section for thirteen species of Polystachya (P. tsaratananae, P. heckeliana, P. rhodochila, P. monophylla, P. henrici, P. clareae, P. virescens, P. aurantiaca, P. rosea, P. anceps, P. pergibbosa, P. perrieri, P. waterlotii) occuring in Madagascar, Comoros and Seychelles is proposed. Full descriptions, illustrations, distribution maps and key to...

A new genus of Orchidaceae (Polystachyinae), Isochilostachya, is described. It is morphologically similar to Polystachya Hook. but is distinct by the narrower, grass-like leaves arranged in the upper part of the stem, long and acuminate floral bracts and sepals, and long clavate or capitate hairs densely arranged on the lip. A comprehensive descrip...

A complete list of all taxa included within the subtribe Polystachyinae Schltr. (Orchidaceae). The synopsis is a part of the monograph of Polystachyinae (Mytnik-Ejsmont 2011)

Polystachya subtribe Polystachyinae is a subject of ongoing taxonomic work. A new monotypic genus, Neoburttia, is described and illustrated. Key for determination of all genera of the subtribe Polystachyinae is included. Morphological differences between Neoburttia and closest relatives, Dendrobianthe and Neobenthamia, are briefly discussed. A new...

A new genus of Orchidaceae (Polystachyinae), Chelystachya Mytnik & Szlach., is described and illustrated basing on results of molecular and morphological studies. It is related to Polystachya Hook. but is distinct in that it has large, single-noded, spherical, succulent pseudobulbs flattened on the substratum, pendent and densely pubescent inflores...

In Asia, three species of Polystachya (Orchidaceae) are recognized, based on detailed morphological studies. They occur in southern Asia, from Tamil Nadu State in southern India and Yunnan Province in southeastern China to Sumbawa Island in southern Indonesia. As circumscribed here, two Asiatic species are endemic to southern India apart from P.con...

Three new species of Pachygenium (Schltr.) Szlach., R.González & Rutk. are described and illustrated: Pachygenium schmidtianum Mytnik, Szlach. & Górniak sp. nova, Pachygenium triangulare Mytnik, Szlach. & Górniak sp. nova and Pachygenium arechavaletae Mytnik, Szlach. & Górniak sp. nova A new nomenclatural combination on the species level, Pachygeni...

A photograph of the newly described orchid species, Stellilabium kukwae, dedicated to Martin Kukwa.

A new species of the genus Stellilabium Salisb. (Telipogonae, Orchidaceae), S. kukwae Szlach. & Mytnik, is described and illustrated from Bolivia. It is morphologically most similar to S. pampatamboense Dodson & R.Vásquez, but it is distinct in having densely, entirely ciliate petals, scarcely ciliate lip lamina, and furculate hairs covering the gy...

This monograph covers geographically southern Chad, Cameroon, Equatorial Guinea, Sao Tome and Principe, the Central African Republic (CAR), Gabon, the Republic of Congo, the Democratic Republic of Congo (DRC, referred to until recently as Zaire) and northern Angola. Introductory chapters (geography, relief, hydology, climate, history, vegetation, e...

Two new species of Polystachya Hook. are described and illustrated: Polystachya rydingii Baranow & Mytnik occurring from the Democratic Republic of Congo and P. sosefii Baranow & Mytnik from Cameroon. The species belong to the section Polystachya Kraenzl., which is the only pantropical section in the genus. Maps of the distribution for the new spec...

Two new species of the genus Schiedeella Schltr. (Orchidaceae), S. jean-mulleri Szlach., Rutk. & Mytnik and S. esquintlensis Szlach., Rutk. & Mytnik, are described and illustrated. Their taxonomic position is briefly discussed.

Two new species of Hapalorchis Schltr. (H. neglecta and H. piesikii) from the Neotropics (Ecuador and Colombia, respectively) are described and illustrated. The taxonomic position of the taxa is briefly discussed.

A new species of the genus Telipogon Kunth from Southern Ecuador is described and illustrated. The new entity is related to T. fritillum and T. dalstroemii, differing from both of them by the petals and the lip structure. Key words: Orchidaceae, Telipogon, new species, Ecuador.

Sobralia Ruiz & Pav. is one of the largest genus in Orchidaceae. It comprises about 150 species distributed from Mexico to Bolivia. In this paper, a new species of Sobralia from Peru, S. abadorum, is described and illustrated. Its taxonomic affinity is briefly discussed. An analysis of ITS sequences indicates an isolate position of this new spec...

This is the fourth and the last part of the series on the gynostemium structure of the order Orchidales. The previous parts were Szlachetko and Rutkowski (2000), Szlachetko and Margofiska (2002) and Szlachetko (2003). In this part we present the results of our investigations on the reproductive structures of the following tribes of the subfamily Va...

Five new species of Pachygenium (Schltr.) Szlach., R. González & Rutk. (Spirantheae, Cyclopogoninae, Orchidaceae) from Brazil are described and illustrated. Their taxonomic position is briefly discussed. The genus is compared with Pelexia Poit. ex Rich., and the taxonomic status of both genera is discussed.

A new orchid species, Cephalanthera ericiflora is described and illustrated. Its taxonomic position is briefly discussed.

A new African genus Unguiculabia Mytnik & Szlach. gen. nov. of the the subtribe Polystachyinae Schltr. (Vandoideae, Orchidaceae) is described. Taxonomic affinities of the newly proposed taxon are briefly discussed. New nomenclatorial combinations are proposed: A new African genus Unguiculabia Mytnik & Szlach. gen. nov. of the the subtribe Polystach...

A new African genus Epiphorella Mytnik & Szlach. gen. nov. of the the subtribe Polystachyinae Schltr. (Vandoideae, Orchidaceae) is described. Taxonomic affinities of the newly proposed taxon are briefly discussed. New nomenclatorial combinations are proposed. Key words: Taxonomy, Orchidaceae, Vandoideae, Polystachyinae, Elasticeae, Polystachya, E...

A checklist of Polystachyinae occurring in Ivowry Coast.

A new species of Pachyphyllum is described and illustrated.

A new species within Veyretia Szlach. is described and illustrated. A new combination within the genus is validated. Taxonomic position of the taxa is briefly discussed. Key words: Orchidaceae, Spirantheae, Cyclopogoninae, Veyretia, neotropics, taxonomy.

A new monotypic genus Disperanthoceros Mytnik & Szlach., gen. nov., of Polystachyinae Schltr. (Vandoideae, Orchidaceae) is described (for Polystachya anthoceros I.la Croix & P.J.Cribb ). Taxonomic affinities of the newly proposed taxon is briefly discussed. New binominal combination is made. Key words: Orchidaceae, Vandoideae, Polystachyinae, Dis...

A new monotypic genus Szlachetkoella Mytnik gen. nov., of the the subtribe Polystachyinae Schltr. (Vandoideae, Orchidaceae) is described (for formerly known Polystachya mystacioies). Notes on its distribution is provided. Taxonomic affinities of the newly proposed taxon and status of the controversial P. crassifolia Schltr. are briefly discussed. N...

A new genus of the subfamily Vandoideae (Orchidaceae) – Christensonella Szlach., Mytnik, Górniak & Śmiszek, gen. nov. – is described. Its taxonomic position is briefly discussed and 16 new combinations are made.

Lophiarella Szlach., Mytnik & Romowicz, gen. nov. and Heteranthocidium Szlach., Mytnik & Romowicz, gen. nov. (Orchidaceae, Vandoideae, Oncidieae) are described as new genera. Their taxonomic relationships are briefly discussed. New binominal combinations in these two new genera are validated.

A new genu, Anettea Szlach. & Mytnik, gen. nov., of the tribe Oncidieae (Vandoideae, Orchidaceae) is described. Taxonomic affinities of the newly proposed taxon is briefly discussed. New binominal combinations are made.

A new genus of the subfamily Vandoideae (Orchidaceae) – Andinorchis Szlach., Mytnik & Górniak, gen. nov. – is described. Its taxonomic position is briefly discussed. Two new combinations on the species level are validated. Key words: Orchidaceae, Vandoideae, Zygopetaleae, Andinorchis, Neotropics

Results of an analysis of ITS sequences for th esubtribe Spiranthinae s.l. (Orchidaceae) are presented and compared with results of morphological studies.

A new African genus Dendrobianthe Mytnik gen. and stat. nov. of the the subtribe Polystachyinae Schltr. (Vandoideae, Orchidaceae) is described. Taxonomic affinities of the newly proposed taxon are briefly discussed. Notes on its distribution are provided. New nomenclatural combinations are proposed.

The authors provided the results of the taxonomic revision of the Brachycorythis-complex. They distinguished Brachycorythis Lindl., Thulinia P.J.Cribb, Gyaladenia Schltr., Diplacorchis Schltr,, Phyllomphax Schltr., Schwartzkopffia Krzl., Silvorchis J.J.Sm. and Afrorchis gen. nov. Brachycorythis and Schwartzkopffia are treated separately because of...

Contributions to the taxonomic revision of the orchid subtribes Spiranthinae Lindl., Stenorrhynchidinae Szlach. and Cyclopogoninae Szlach. in Mesoamerica and the Antilles, based on over 1800 herbarium specimens from 36 herbaria, are presented. The taxonomic treatment of 170 species from 35 genera (Aulosepalum Garay, Beloglottis Schltr..) includes d...

Contributions to the taxonomic revision of the orchid subtribes Spiranth inae Lindl., Stenorrhynchidinae Szlach. and Cyclopogoninae Szlach. in Mesoamerica and the Antilles, based on over 1800 herbarium specimens from 36 herbaria, are presented. The taxonomic treatment of 170 species from 35 genera (Aulosepalum Garay, Beloglottis Schltr., Brachystel...

Contributions to the taxonomic revision of the orchid subtribes Spiranthinae Lindl., Stenorrhynchidinae Szlach. and Cyclopogoninae Szlach. in Mesoamerica and the Antilles, based on over 1800 herbarium specimens from 36 herbaria, are presented. The taxonomic treatment of 170 species from 35 genera (Aulosepalum Garay, Beloglottis Schltr., Brachystele...

Contributions to the taxonomic revision of the subtribes Spiranthinae Lindl., Stenorrhynchidinae Szlach. and Cyclopogoninae Szlach. (Orchidaceae) in Mesoamerica and the Antilles.

A new species of the genus Veyretella (Orchidaceae, Habenariinae) – V. flabellata Szlach., Marg. & Mytnik, sp.nov. - from Gabon is described and illustrated. Key Words: Orchidaceae, Habenariinae, Veyretella, Gabon

The following new species of the Orchidaceae subtribe Stenorrhynchidinae are described and illustrated: Coccineorchis cristata Szlach., Rutk. & Mytnik, C. dressleri Szlach., Rutk. & Mytnik, C. warszewicziana Szlach., Rutk. & Mytnik, Schiedeella tamayoana Szlach., Rutk. & Mytnik, S. williamsiana Szlach., Rutk. & Mytnik, and Svenkoeltzia pamelae Szla...

The following new species of the orchid subtribe Cyclopogoninae are describedand illustrated: Pelexia ghiesbreghtii Szlach., Mytnik & Rutk., Potosia kusibabiana Szlach., Mytnik & Rutk., P. praetermissa Szlach., Mytnik & Rutk., and P. tamayoana Szlach., Mytnik & Rutk. Cyclopogon subgenus Pseudowarscea Szlach., Mytnik &Rutk. subgen. nov. is establi...

The following new species of the subtribe Spiranthinae (Orchidaceae, Spirantheae) are described and illustrated: Brachystele tamayoana Szlach., Rutk. & Mytnik and Kionophyton pollardiana Szlach., Rutk. & Mytnik. Keys for determination of the Mesoamerican species of Brachystele, Kionophyton and Galeottiella are provided. The following new combinatio...

A new species of Pseudoeurystyles (Orchidaceae, Spiranthinae) from Brazil - P. ochyrana - is described and illustrated. Its taxonomic affinities are briefly discussed.

Lecanorchis seidenfadeni (Orchidaceae, Vanilloideae), a new orchid species from Malaya