Scielo RSS <![CDATA[Lankesteriana]]> http://www.scielo.sa.cr/rss.php?pid=1409-387120160001&lang=en vol. 16 num. 1 lang. en <![CDATA[SciELO Logo]]> http://www.scielo.sa.cr/img/en/fbpelogp.gif http://www.scielo.sa.cr <![CDATA[Ecología y estructura poblacional del endemismo cubano Tetramicra malpighiarum (orchidaceae),en el Parque Nacional Desembarco del Granma, Cuba]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100001&lng=en&nrm=iso&tlng=en Resumen: En Cuba se reconocen aproximadamente 315 especies para la familia Orchidaceae, de las cuales son endémicas alrededor de 32 %. Durante 2012 y 2013, se estudió una población del endemismo cubano Tetramicra malpighiarum (Orchidaceae), en el Parque Nacional Desembarco del Granma, Cuba. Se estudió la abundancia de la especie, clases de vida de los individuos (inmaduros y adultos), forófitos sobre los que crecían, micrositios que ocupaban en los mismos (tronco, ramas o ramillas), si los individuos estaban solitarios o agregados y orientación cardinal que tenían sobre los forófitos. Se encontraron 254 individuos de T. malpighiarum, distribuidos en 20 forófitos. Por primera vez se localizaron individuos de T. malpighiarum ocupando otras cinco especies de forófitos, además de Malpighia incana (Malpighiaceae) y Erythroxylum havanense (Erythroxylaceae). Fueron adultos 69.3 % de los individuos y en las ramillas crecía 93.7 % de la población. Es similar el número de individuos de T. malpighiarum creciendo agregados y creciendo solitarios. La población muestra una pequeña tendencia a crecer preferentemente con orientaciones sur y noroeste. Este trabajo es una primera aproximación a la ecología poblacional de T. malpighiarum, pero es fundamental realizar estudios genéticos y demográficos a largo plazo, que permitan monitorear el comportamiento poblacional y reproductivo de este endémico cubano, y averiguar los niveles de endogamia y variabilidad genética de los individuos, para conocer su posible comportamiento y permanencia en el futuro.<hr/>Abstract: In Cuba,there are 315 species of Orchidaceae family, approximately 32 % of these species are endemic. During 2012 and 2013 an endemic population of Tetramicra malpighiarum (Orchidaceae) was studied at the Desembarco del Granma National Park, Cuba. We determined the abundance of this species, life classes (immature and adult), phorophytes inhabited, vertical distribution (trunk, branches or twigs), solitary or aggregated growing, and its cardinal orientation on phorophytes. We found 254 individuals of T. malpighiarum distributed in 20 phorophytes. For the first time, were found individuals of T. malpighiarum grew on other five species of phorophytes, besides of Malpighia incana (Malpighiaceae) and Erythroxylum havanense (Erythroxylaceae). Of the total of individuals recorded, 69.3 % were adult and 93.7 % were growing on the twigs. The number of solitary individual and aggregated individuals was similar. The population shows a slight tendency to grow toward south and northwest orientations. This is the first study to describe the population ecology of T. malpighiarum, but it is recommended to conduct long-term genetic and demographic studies. These future studies should be explored the reproductive system (e.g., level of endogamy) and population genetic of this species endemic of Cuba in order to evaluate its permanency in the future. <![CDATA[Nomenclatural and taxonomic notes in <strong><em>phymatidium geiselii</em></strong> (oncidiinae, orchidaceae)]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100012&lng=en&nrm=iso&tlng=en Abstract: Phymatidium glaziovii is proposed as a new synonym for P. geiselii. A lectotype and an epitype are selected for P. geiselii. Illustrations and taxonomic discussions are also provided. <![CDATA[Morphometric analysis of vanilla seeds (orchidaceae) by microscopic techniques]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100019&lng=en&nrm=iso&tlng=en Abstract: Seed morphometric characters of four Colombian Vanilla species (Vanilla odorata, Vanilla calyculata, Vanilla oroana and Vanilla rivasii) were compared by using both light and electron microscopy. Seeds collected from mature fruits were studied by optical microscopy to characterize coat color, length and width of seeds in Vanilla species. Scanning electron microscopy (SEM) was used to characterize the seed surface and cell shape in these species. There were significant differences in length, width and length/width ratio. Vanilla oronana had the largest seeds (431 ± 17 µm long and 312 ± 27 µm wide) and differed from the other species by its dark brown seed coat and the presence of protrusions. Vanilla odorata was the species with smallest seeds (310 ± 15 µm long and 222 ± 18 µm wide) and light brown seed coat. Seeds of all studied species had smooth coat surfaces and were of oval to ellipsoid in shape. The characters evaluated in this work could serve as taxonomic diagnostic markers in Vanilla and these could explain important aspects of the seed biology of this genus.<hr/>Resumen: Se caracterizó y se comparó la morfometría de las semillas de cuatro especies de vainillas colombianas (Vanilla odorata, Vanilla calyculata, Vanilla oroana y Vanilla rivasii). Las semillas colectadas a partir de frutos maduros fueron estudiadas por microscopía óptica para caracterizar el color, la longitud y el ancho de las semillas. Además, por medio de microscopía electrónica de barrido (MEB) se identificaron las características de la superficie de la testa. Existieron diferencias significativas en la longitud, el ancho y en la relación longitud/ ancho entre las especies. Vanilla oronana tuvo las semillas más grandes (431 ± 17 µm de largo y 312 ± 27 µm de ancho) y difirió de las otras especies por presentar la coloración parda en tono más oscuro y por la presencia de protuberancias en la testa. Vanilla odorata fue la especie con semillas más pequeñas (310 ± 15 µm de longitud y 222 ± 18 µm de ancho) de color pardo claro. En general, las semillas presentaron la testa lisa y una forma elipsoide. Los caracteres evaluados en este trabajo podrían servir como marcadores taxonómicos en Vanilla y podrían explicar aspectos importantes de la biología de las semillas de este género. <![CDATA[Epidendrum lasiostachyum (orchidaceae): a new colombian species of the epidendrum macrostachyum group]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100025&lng=en&nrm=iso&tlng=en Abstract: In Epidendrum,considered a monophyletic genus, diverse groups can be recognized by their similar vegetative and floral characteristics. The revision of one of these groups, the E. macrostachyum group, recognized by the monopodial habit, with sub-apical branching, apical, erect inflorescence, non-resupinate, fleshy flowers, and entire lip, embracing the column, pubescent at least at the base, has led to the description of several new species, including a new species from Colombia that is here described and illustrated. The species is similar to Epidendrum microrigidiflorum, but differs in the inflorescence (distichous, 6 flowered vs. racemose, 8-16 flowered), the shape (trullate vs. widely rhombic) and ornamentation of the lip (sericeous vs. minutely papillose), and the lack of calli on the disc of the lip (ecallose vs. bicallose). In addition, a key to the 41 species of the group is provided.<hr/>Resumen: En Epidendrum, siendo considerado un género monofilético, se pueden reconocer diversos grupos de especies con características vegetativas y florales similares. La revisión de uno de estos grupos, el grupo E. macrostachyum, el cual se reconoce por su hábito monopodial con ramificaciones subapicales, inflorescencia apical, erecta y flores no resupinadas, carnosas con el labelo entero abrazando la columna y pubescente por lo menos en la base, ha permitido la descripción de varias especies nuevas, entre ellas la nueva especie que se describe y se ilustra aquí. Es una especie colombiana similar a Epidendrum microrigidiflorum, sin embargo difiere por la inflorescencia (dística, 6 flores vs. racemosa, 8-16 flores), en la forma (trulado vs. anchamente rómbico) y ornamentación del labelo (densamente seríceo vs. diminutamente papiloso) y en la ausencia de callos en el disco del mismo (ecalloso vs. bicalloso). Se presenta además una clave de las 41 especies del grupo. <![CDATA[Clarification of two taxon names of <strong><em>phragmipedium</em></strong> (orchidaceae, cypripedioideae)]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100036&lng=en&nrm=iso&tlng=en Abstract: Two subspecies of Phragmipediumhumboldtiifrom Guatemala, P. humboldtii subsp.monstruosumand P.humboldtiisubsp.triandrum (Orchidaceae, Cypripedioideae) were wrong published in Die Orchidee 66(3), 2015, since the new status of these subspecies are based on an incorrect name for the authorship of P. humboldtii(Warsz. ex Rchb.f.) J.T. Atwood &amp; Dressler instead of P. humboldtii (Warsz.) J.T. Atwood &amp; Dressler. The formal names of the subspecies are corrected here. <![CDATA[<strong><em>Lepanthesmiraculum</em></strong> (orchidaceae), a new addition to the peruvian orchid flora]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100037&lng=en&nrm=iso&tlng=en Abstract Lepanthesmiraculum, formerly known from one area in Bolivia, is reported from Machu Picchu in southern Peru. Illustrations, figures, notes on the specimens found in Peru and an updated description are provided and compared to those known from Bolivia.<hr/>Resumen Lepanthesmiraculum, conocido de una localidad en Bolivia, es reportado en Machu Picchu al Sur del Perú. Se incluyen ilustraciones, figuras y notas sobre los especímenes encontrados en Perú y se les compara con los conocidos de Bolivia. <![CDATA[Floral sexual differentiation in <strong><em>catasetumfimbriatum</em></strong> (catasetinae, orchidaceae) exposed to different light intensities]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100043&lng=en&nrm=iso&tlng=en Abstract To elucidate the factors which control the flower phenotypic plasticity of Catasetum fimbriatum, studies focusing the floral development of the species were performed. The treatments were: high light intensity (1613 μmol.m-2.s-1); low light intensity (454 μmol.m-2.s-1) and mean light intensity (827 μmol.m-2.s-1). The floral morphology and anatomy were analyzed to evaluate of the sequence of tissue development involved in the sexual differentiation. We found the presence of cell cluster with meristematic features in the ovaries and gynostemium of the male and female diclinous flowers. These are responsible for the definition of the sexual expression of the species, in the dependence of the environmental stimulus, related to the endogenous concentration of ethylene, allowing, consequently, the dedifferentiation and re-differentiation of those clusters in the sexual determination of the flowers. There were no anatomical differences in floral tissues in different treatments. <![CDATA[Lankesteriana, a no impact journal... or is it?]]> http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-38712016000100053&lng=en&nrm=iso&tlng=en Abstract To elucidate the factors which control the flower phenotypic plasticity of Catasetum fimbriatum, studies focusing the floral development of the species were performed. The treatments were: high light intensity (1613 μmol.m-2.s-1); low light intensity (454 μmol.m-2.s-1) and mean light intensity (827 μmol.m-2.s-1). The floral morphology and anatomy were analyzed to evaluate of the sequence of tissue development involved in the sexual differentiation. We found the presence of cell cluster with meristematic features in the ovaries and gynostemium of the male and female diclinous flowers. These are responsible for the definition of the sexual expression of the species, in the dependence of the environmental stimulus, related to the endogenous concentration of ethylene, allowing, consequently, the dedifferentiation and re-differentiation of those clusters in the sexual determination of the flowers. There were no anatomical differences in floral tissues in different treatments.