Lankesteriana

Notes on the identify of ceratostylis siamensis (epidendroideae: podochileae) from India

Abstract. While conducting taxonomic studies on the tribe Podochileae (Orchidaceae) for the Flora of India, two species, Ceratostylis siamensis and Ceratostylis himalaica have been examined using types, protologues, fresh specimens, and authentic herbarium collections. Ceratostylis siamensis was previously reported and documented in Arunachal Pradesh, India. However, we determined upon closer examination that this record was based on erroneous identification. The correct identity of this species is C. himalaica. Consequently, Ceratostylis siamensis is excluded from the flora of India.

Lepanthes chalalensis (pleurothallidinae), a new species endemic to the santander department in Colombia

Abstract. We propose Lepanthes chalalensis as a newly identified species confined to the north-east Andes of Colombia. We randomly placed 341 sampling plots across the Eastern Cordillera, including transformed and natural habitats. Here, we provide a detailed description, illustrating images, ecological discussions, a taxonomic key for the new entity, and a conservation status analysis. The species is highly geographically restricted (in 2 out of 341 sampling plots) and has a low population size (26 adult individuals). While L. chalalensis shows a resemblance to L. velosa from Ecuador, it can be distinguished by the wide lower lobe of the petals, which is long ciliated, the lip laminae, which are reduced and bear stiff cilia, and the appendix length, which appear to be twice as long as the lip blades. The species should be considered a conservation concern due to its high rarity.

Resumen. Proponemos Lepanthes chalalensis como una nueva especie confinada al noreste de los Andes de Colombia. La nueva especie fue hallada en un muestreo de 341 parcelas aleatoriamente posicionadas a lo largo de la Cordillera Oriental, incluyendo hábitats transformados y naturales. Se proporcionan la descripción detallada, imágenes ilustrativas, discusiones ecológicas y un análisis del estado de conservación. La especie está altamente restringida geográficamente (en 2 de las 341 parcelas de muestreo) y tiene un tamaño de población bajo (26 individuos adultos). Aunque L. chalalensis muestra una similitud con L. velosa de Ecuador, puede distinguirse por el lóbulo inferior de los pétalos, que es ancho y presenta una cilios largos, las láminas del labelo, que están reducidas y presentan cilios rígidos, y la longitud del apéndice, que parece ser el doble de la longitud de las láminas del labelo. La especie debe considerarse una preocupación de conservación debido a su alta rareza.

New species and records of orchidaceae from Costa Rica IV.

Abstract The fourth release of the series “New Species and Records of Orchidaceae from Costa Rica” documents and illustrates 17 taxa of the Costa Rican orchid flora. The new species records belong to the subtribes Pleurothallidinae (9 spp.), Maxillariinae (3 spp.), and Oncidiinae (2 spp.), including the description of two new species in Pleurothallis and Telipogon. Two new forms are described for Isochilus latibracteatus (Ponerinae) and Masdevallia striatella (Pleurothallidinae), and their differences from the typical forms are discussed. Additionally, the first record of a naturalized population of Phalaenopsis stuartiana (Aeridinae) in Costa Rica is discussed. Detailed descriptions, based on selected Costa Rican material, are included for all taxa, along with illustrations or Lankester Composite Digital Plates (LCDP). Information on their etymology, distribution, habitat, phenology, and distinguishing features compared to morphologically similar species is also provided. Finally, following the publication of the most recent Costa Rican orchid catalogue, we have identified some omissions and other new species described, which are discussed here. The orchid flora of Costa Rica now includes 1695 species and nine forms.

Resumen La cuarta entrega de la serie “Nuevas especies y registros de Orchidaceae de Costa Rica” documenta e ilustra 17 taxones para la flora de orquídeas costarricenses. Los nuevos registros de especies pertenecen a las subtribus Pleurothallidinae (9 spp.), Maxillariinae (3 spp.) y Oncidiinae (2 spp.), incluyendo la descripción de dos especies nuevas en Pleurothallis y Telipogon. Se describen dos nuevas formas para Isochilus latibracteatus (Ponerinae) y Masdevallia striatella (Pleurothallidinae), y se discuten sus diferencias con las formas típicas. Además, se discute el primer registro de una población naturalizada de Phalaenopsis stuartiana (Aeridinae) en Costa Rica. Se incluyen descripciones detalladas, basadas en material costarricense seleccionado, para todas las especies, junto con ilustraciones o láminas digitales compuestas Lankester (LCDP). También se proporciona información sobre su etimología, distribución, hábitat, fenología y características distintivas comparadas con especies morfológicamente similares. Finalmente, tras la publicación del más reciente catálogo de orquídeas de Costa Rica, hemos identificado algunas omisiones y otras nuevas especies descritas que se comentan aquí. La flora de orquídeas de Costa Rica incluye ahora 1695 especies y nueve formas.

Bulbophyllum lampadion (section monathes), a new species from new Guinea

Abstract Bulbophyllum lampadion from New Guinea is herein described and illustrated based on herbarium specimens and cultivated material. This high-elevation species belongs to section Monanthes, of which sect. Oxysepala is here considered to be a synonym.

A new species of dendrobium sect. crinifera (dendrobieae) from Thailand

Abstract A new species of Dendrobium sect. Crinifera is described from Thailand. The late Peter O’Byrne is appropriately credited for his important preparatory work for our study and for coining the name of the new species, D. krabiense. Apparently endemic to southern Thailand, D. krabiense is similar to D. pardalinum but differs in the lip mid-lobe being distinctly clawed and in the lip ornaments only consisting of two lateral keels that extend from near lip base to claw of mid-lobe. Dendrobium krabiense is also similar to D. phuketense but differs in having larger, spotted flowers with a proportionally longer mentum. The material here referred to D. krabiense was previously misidentified as Flickingeria pallens (now considered a synonym of D. pardalinum).

Addiction of five orchid species to the flora of Bhutan

Abstract. Bhutan, situated in the eastern part of the Himalaya Biodiversity Hotspot, is renowned for its rich flora and fauna. This biodiversity is attributed to the country’s multiple biogeographic origins, diverse topography, ecological complexity, and varied climatic and soil conditions. However, much of the flora remains under-collected, with many taxa yet to be discovered. From June 2022 to March 2024, floristic studies were conducted in Bhutan, leading to the discovery of five orchid species not previously recorded in the country: Bulbophyllum crabro, B. rigidum, Cymbidium tortisepalum var. longibracteatum, Galeola cathcartii, and Liparis kumokiri. These species are scientifically documented for the first time in Bhutan. Detailed descriptions, type information, updated global distribution, ecology, and colour plates of the recorded species are provided.