Lankesteriana

Denbrodium derryi (Epidendroideae: malaxideae): an addition to the flora of India

Abstract Dendrobium derryi, a new addition to the orchid flora of India, has been discovered in Karbi Anglong district of Assam. This article provides an updated description of the species, accompanied by detailed photos and line drawings based on material collected within the country.

A new species of epidendrum (Laeliinae) of the incomptum group from the north of Antioquia, Colombia

Abstract A new species of Epidendrum of the Incomptum group is described and illustrated, thus far found only at the type locality. Information is provided to separate the species belonging to the Arbuscula and Incomptum groups. Additionally, the new taxon described herein, Epidendrum pembertonii, is thoroughly compared with the four most morphologically similar species (E. brenesii, E. bisulcatum, E. foldatsii, E. sotoanum), revealing notable differences in the number and shape of leaves, inflorescence length, flower color, venation of sepals, as well as the shape and ornamentation of the lip and column.

Resumen Se describe e ilustra una especie nueva de Epidendrum del grupo Incomptum, hasta ahora encontrada solamente de la localidad tipo. Se proporciona información para separar las especies pertenecientes a los grupos Arbuscula e Incomptum. Además, el nuevo taxón descrito aquí, Epidendrum pembertonii, se compara minuciosamente con las cuatro especies morfológicamente más similares (E. brenesii, E. bisulcatum, E. foldatsii, E. sotoanum), mostrando diferencias notables en la cantidad y forma de las hojas, longitud de la inflorescencia, color de las flores, venación de los sépalos, forma y ornamentación del labelo y columna.

Two new species of pleurothallidinae from cloud forest remnantsin the eastern Andes de Colombia

Abstract Two new pleurothallid species of the genera Lepanthes and Pleurothallis, native to cloud forest remnants of the Eastern Andes of Colombia, are described and illustrated. Lepanthes pseudoabitaguae is compared with Lepanthes abitaguae, from which it differs by the color of the flowers and by the oblong and biglandular appendix. Pleurothallis falcata is similar to Pleurothallis suspensa, but can be recognized by the falcate to lanceolate leaves, denser inflorescences, longer sepals, and the lip completely recurved with erose apical margins. We also provide comparisons with similar species and offer comments on their ecology. Furthermore, we discuss the significance of this highly anthropized region and its richness in orchid species.

Resumen Se describen e ilustran dos nuevas especies de Pleurothallidinae de los géneros Lepanthes y Pleurothallis, nativas de remanentes de bosque nublado en los Andes Orientales de Colombia. Lepanthes pseudoabitaguae se compara con Lepanthes abitaguae, de la cual difiere por el color de las flores y por el apéndice oblongo y biglandular. Pleurothallis falcata es similar a Pleurothallis suspensa, pero puede ser reconocida por las hojas falcadas a lanceoladas, inflorescencias más densas, sépalos más largos y el labelo completamente recurvo con márgenes apicales erosas. También proporcionamos comparaciones con especies similares y ofrecemos comentarios sobre su ecología. Además, discutimos la importancia de esta región altamente antropizada y su riqueza en especies de orquídeas.

Malaxis engelsii (malaxidinae), a new species from the upper montane forest of the atlantic rainforest in southern Brazil

Abstract Malaxis engelsii is a newly discovered orchid found in the upper montane forests of the Atlantic Rainforest in Paraná, Brazil. This species is characterized by its small size, elliptic leaves, flowers with partially connate sepals at the base, trilobate lip with four cavities, and a longitudinal keel on the adaxial surface of the lip apex. A detailed description, photographs, drawings, and comparison with similar species, Malaxis cipoensis, M. sertulifera, and M. ybytus, are provided. Currently, it is classified according to the IUCN guidelines as “Endangered (EN)’’.

Resumo Malaxis engelsii é uma orquídea recém-descoberta encontrada nas florestas alto-montanas da Mata Atlântica no Paraná, Brasil. Esta espécie é caracterizada por seu pequeno porte, folhas elípticas, flores com sépalas parcialmente conadas, labelo trilobado com quatro cavidades e uma quilha longitudinal na superfície adaxial do ápice do labelo. Uma descrição detalhada, fotografias, ilustração e comparação com espécies similares, Malaxis cipoensis, M. sertulifera e M. ybytus, são fornecidas. Atualmente, está classificada de acordo com as diretrizes da IUCN como “Em Perigo (EN)’’.

Two new species of Telipogon (Oncidiinae) from Costa Rica

Abstract The Neotropical genus Telipogon (Oncidiinae), comprising approximately 250 species, exhibits remarkable species diversity in the humid, montane forests of southern Central America and the Tropical Andes. Telipogon, when broadly defined, encompasses both the large-flowered species that mimic tachinid flies and the small-flowered species formerly classified under Stellilabium. In Costa Rica, this genus includes 55 species, with 16 classified as small-flowered species. While the large-flowered species of Telipogon (in the strict sense) have been taxonomically revised, the small-flowered species have yet to be the subject of a thorough taxonomic revision. Our research aims to partially fill this gap by focusing on a comparative morphological analysis of two novel small-flowered Telipogon species. We describe and illustrate Telipogon lateritius and T. muntzii, both discovered in the humid mid-elevation forest of the Caribbean watershed in Cordillera de Talamanca, Costa Rica. Telipogon lateritius is notable for its distinctive brick-colored flowers, featuring sepals, petals, and lips striped in chestnut brown; the lateral sepals connate into a triangular-ovate synsepal, complemented by sparse, stiff pubescence at the base of the lip. Telipogon muntzii, although closely resembling T. anacristinae, differs in its unique olive-green flowers, sparse trichomes on the lip, narrowly oblong lateral lobes of the column, and a helmet-shaped median lobe of the column exclusively covered by simple trichomes. This study provides new additions for a future taxonomic revision of Telipogon in Costa Rica.

Resumen El género neotropical Telipogon (Oncidiinae), que comprende aproximadamente 250 especies, exhibe una notable diversidad de especies en los bosques húmedos montanos del sur de Centroamérica y los Andes tropicales. Telipogon, en sentido amplio, abarca tanto las especies de flores grandes que imitan a las moscas taquínidas como las especies de flores pequeñas anteriormente clasificadas en Stellilabium. En Costa Rica, este género incluye 55 especies, de las cuales 16 están clasificadas como especies de flores pequeñas. Mientras que las especies de Telipogon de flores grandes (en sentido estricto) han sido revisadas taxonómicamente, las especies de flores pequeñas aún no han sido objeto de una revisión taxonómica exhaustiva. Nuestra investigación tiene como objetivo llenar parcialmente este vacío centrándose en un análisis morfológico comparativo de dos nuevas especies de Telipogon de flores pequeñas. Describimos e ilustramos Telipogon lateritius y T. muntzii, ambos descubiertos en el bosque húmedo de elevación media de la cuenca del Caribe en la Cordillera de Talamanca, Costa Rica. Telipogon lateritius se destaca por sus distintivas flores de color ladrillo, con sépalos, pétalos y labios con rayas de color marrón castaño, los sépalos laterales connados en un sinsépalo triangular-ovado, complementados con una pubescencia escasa y rígida en la base del labio. Telipogon muntzii, aunque similar a T. anacristinae, difiere por sus flores únicas de color verde oliva, escasos tricomas en el labelo, lóbulos laterales de la columna estrechamente oblongos y un lóbulo mediano de la columna en forma de casco cubierto exclusivamente por tricomas simples. Este estudio proporciona nuevas adiciones para una futura revisión taxonómica de Telipogon en Costa Rica.

New species of maxillaria (maxillariinae) from the northern andes and a new synonym of maxillaria floribunda

Abstract Maxillaria andina, a new orchid species from high-Andean ecosystems of southwestern Colombia and northern Ecuador, is described. The new species is distinguished by having long and narrowly linear white sepals and petals with revolute margins, lip with mucronate epichile, and callus without hairs or trichomes. Distinguishing characters are provided to differentiate it from morphologically similar species, along with ecological and taxonomical notes. Additionally, Maxillaria sibundoyensis is synonymized with Maxillaria floribunda.

Resumen Maxillaria andina, una nueva especie de orquídea de ecosistemas altoandinos del suroccidente de Colombia y norte de Ecuador, es descrita. La nueva especie se distingue por presentar sépalos y pétalos blancos, largos y estrechamente lineales, con los márgenes revolutos, el labelo con un epiquilo mucronado y el callo sin pelos ni tricomas. Presentamos caracteres distintivos que diferencian a la nueva especie de sus especies morfológicamente similares, así como notas ecológicas y taxonómicas. Adicionalmente, Maxillaria sibundoyensis es sinonimizada con Maxillaria floribunda.

Host suitability for germination differs from that of later stages of development in a rare epiphytic orchid

Abstract We explore phorophyte suitability for germination and establishment of the epiphytic orchid, Psychilis kraenzlinii. We found that the orchid grows on a subset of the available tree species and shows preference for the endemic Machaonia portoricensis (Rubiaceae). The orchid preferred trees with smoother bark, high water holding capacity and low water retention capacity. Microclimatic conditions under which embryos began pre-germination stages mirrored that of the adult orchid, but germination did not, suggesting that suitable germination sites are not necessarily the best sites for later stages of development.

Resumen Exploramos la utilización de árboles y los patrones de germinación de la orquídea epífita, Psychilis kraenzlinii. Encontramos que P. kraenzlinii crece en un subconjunto de las especies de árboles disponibles y muestra preferencia por la endémica Machaonia portoricensis. La orquídea prefiere árboles con corteza lisa y alta capacidad de sostener agua y baja capacidad de retención de agua. Las condiciones microclimáticas bajo las cuáles los embriones empienzan etapas pre-germinacíon, reflejan los de la orquídea adulta, pero las condiciones bajo las cuáles los embriones llegan a etapas de germinación no. Lo que sugiere que los sitios de germinación adecuados no son necesariamente los lugares donde mejor se producirá el desarrollo a etapas más avanzadas de la germinación.

Sarcoglottis wernerherzogii (Spiranthinae), a new species from Cusco, Peru,: addenda

Abstract A comparative table between Sarcoglottis wernerherzogii, S. fasciculata, and other species of the genus present in Peru, is included.

Resumen Se incluye una tabla comparativa entre Sarcoglottis wernerherzogii, S. fasciculata y otras especies del género presentes en Perú.

Notes on australasina orchids 8: eight new species of hymenochilus (pterostylidinae) and clarification ot two previosly described species

Abstract Eight new species of Hymenochilus from Australia are described and illustrated. Six of the new species have affinities to (and are here compared with) H. cycnocephalus: H. anemophilus, H. calcicola, H. cymbellus, H. longipes, H. nemoralis and H. pachylus. Hymenochilus anemophilus is shorter (2-8 cm), with dark green strongly veined rosette leaves, crowded dark green flowers, oblong to obovate labellum lamina and, a broader blunter beak on the labellum appendage; H. calcicola is shorter (3-12 cm), crowded green flowers with prominent dark green stripes, ovate petals with a strongly developed basal flange on the anterior side and narrow elliptic labellum lamina with a broad pointed beak on the labellum appendage; H. cymbellus differs by its sparser basal rosette with narrower rosette leaves, thinner scapes, flowers with distinct darker green stripes and shallowly saccate lateral sepals that narrow inwards to a distinctly pointed apex; H. longipes differs by its thin-textured rosette leaves, widely spaced darker green flowers with darker green veins, elliptic-obovate labellum lamina and a longer labellum basal appendage which protrudes prominently from the flower in side view; H. nemoralis has longer rosette leaves, thicker scape and darker green flowers with prominent narrow dark green stripes; H. pachylus has thicker rosette leaves, taller, thicker scape, flowers prominently striped, elliptic-obovate labellum lamina and labellum appendage with a short thick beak. Two of the new species have affinities (and are here compared) with H. muticus: H. pagophilus and H. pisinnus. Hymenochilus pagophilus differs by its moderately crowded to crowded flowers, broader, shinier flowers and rectangular-obovate labellum and H. pisinnus differs by its smaller rosette with smaller, narrower leaves, thinner scape, smaller flowers, that are often on long pedicels, shorter, shallowly saccate lateral sepals, smaller rhomboid petals and, smaller obovate labellum. In addition, Hymenochilus cycnocephalus and H. muticus, are characterised in the strict sense with full descriptions, distribution, and habitat.