Abstract
ABSTRACT The genus Tropidia is composed of ca. 20-30 species distributed in southern Asia, South Pacific islands and northern Australia, and a single species occurring in America, from United States to Ecuador. The first record of the genus Tropidia for Brazil is presented here. It consists of Tropidia polystachya, a species found in the Cerrado biome, Midwestern Brazil. Description, illustration, photos, and distribution map of the species are provided. Additionally, the leaf anatomy of the species was studied and it is very similar to the leaves of other species of Tropidieae described so far. DNA sequences of T. polystachya are presented (plastid matK and rbcL and nuclear ITS) in order to assist future phylogenetic studies with the genus.
Highlights
The genus Tropidia Lindl (Orchidaceae) is composed of ca. 20-30 species, distributed in southern Asia, South Pacific islands and northern Australia, and a single species occurring in America, from United States to Ecuador (Pridgeon et al 2005, Govaerts et al 2016)
Tropidia polystachya (Swartz) Ames is commonly known in the United States as youngpalm orchid (Hammer 1997), and it is the only Neotropical species of the genus (Pridgeon et al 2005)
Sampling - In 2012 and 2013, during field works in southwestern Mato Grosso State, in an area of the Cerrado biome, sterile individuals of T. polystachya were found
Summary
The genus Tropidia Lindl (Orchidaceae) is composed of ca. 20-30 species, distributed in southern Asia, South Pacific islands and northern Australia, and a single species occurring in America, from United States to Ecuador (Pridgeon et al 2005, Govaerts et al 2016). 2. Universidade Federal do Paraná, Setor de Ciências Biológicas, Centro Politécnico, Jardim das Américas, Caixa postal 19031, 81531980 Curitiba, Paraná, Brasil. 3. Universidade do Estado de Mato Grosso, Centro de Estudos, Pesquisa e Desenvolvimento Agro-Ambiental (CPEDA) Rod. MT 358, km 7,5, Jardim Aeroporto, Caixa postal 287, 78300-000 Tangará da Serra, Mato Grosso, Brasil. Tropidia polystachya (Swartz) Ames is commonly known in the United States as youngpalm orchid (Hammer 1997), and it is the only Neotropical species of the genus (Pridgeon et al 2005). Based on the analyses of the Brazilian specimen, we present a description, detailed illustration, photographs, distribution map, anatomical characterization of the leaves, and plastid genes (rbcL and matK) and nuclear (ITS) sequences of the species
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