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Epidendrum unicallosum Hágsater & E.Santiago. Lankester Composite Digital Plate (LCDP). A. habit. B. flower. C. dissected perianth. D. lateral view of the column and the lip. E; pollinarium. F. lateral view of the longitudinally dissected column, with the nectary exposed. G. column (ventral and lateral views).
Source publication
Two new species of Epidendrum from the Costa Rican montane rainforest, E. hartmanniorum and E. vallis-silentii, are de- scribed, illustrated and compared with similar species. Epidendrum stolidium and E. unicallosum are reported as new records of this genus for the country.
Similar publications
The genus Thismia Griffith (1844: 221) of the tribe Thismieae, Burmanniaceae sensu APG IV (2016) or Thismiaceae of other authors, represents one of the most species-rich mycoheterotrophic genera and consists of more than 60 species (Jonker 1948, Merckx 2008). Considering that the majority of these species were collected only once (Jonker 1948), and...
Citations
... Specimens of an undescribed Epidendrum species were recently collected during the preparation of an updated orchid flora of Costa Rica by staff of Lankester Botanical Garden. The unusual scandent plants were found growing as large, mat-forming epiphytes at high elevations on the Cordillera de Talamanca, a vast mountainous area that has revealed numerous previously unknown Epidendrum species in recent years (Bogarín et al. 2008, Bogarín et al. 2011, Karremans et al. 2012, Fernández et al. 2014, Díaz-Morales & Karremans 2016, Karremans 2021). ...
We describe and illustrate a new species of Epidendrum from the montane forests on the Cordillera de Talamanca, in Costa Rica. Epidendrum scandens is unusually among the 'Rugosum subgroup' of 'Ramosum group' in the plants forming large mats, composed of elongate, scandent, climbing stems that are notoriously branching and flexuous, becoming liana-like. The 2-3-flowered inflorescence is extremely discrete in relation to the stem, it bears typical yellowish-green flowers partially hidden by large floral bracts. The triangular lip is unusual in the conspicuous apical thickening. A taxonomic description, illustration, distribution map and conservation status are provided for the new species.
... Despite that numerous botanical expeditions have been carried out in different locations of Costa Rica, there are still little explored areas where new or unrecorded species of orchids may be harbored (Bogarín 2011, Bogarín et al. 2020, Chinchilla et al. 2020b, Fernández et al. 2014, Karremans & Díaz-Morales 2016, Karremans et al. 2012. To update floristic inventories and contribute to the knowledge of Malaxis, we have carried out botanical explorations in these less explored areas to collect, document, and identify their species (Chinchilla 2019). ...
Abstract. We describe and illustrate a new species and a new record of Malaxis from the lower montane and montane forests of Costa Rica. Taxonomic descriptions, illustrations, distribution maps, and conservation assessments are provided for each species. Malaxis excentrica sp. nov. is morphologically similar to Malaxis simillima, from which it can be distinguished by having a single leaf per sympodial unit, shorter, obovate, erect petals parallel to the column, the lip with triquetrous, acute, convex apical margin and the disc cavity divided by a costa. Malaxis pittieri is formally recorded for the flora of Costa Rica; Costa Rican specimens of this species were previously confused with Malaxis majanthemifolia. A lectotype for Microstylis pittieri is formally designated.
Resumen. Describimos e ilustramos una nueva especie y un nuevo registro de Malaxis de los bosques montano bajo y montano de Costa Rica. Se proporcionan descripciones taxonómicas, ilustraciones, mapas de distribución y evaluaciones de conservación para cada especie. Malaxis excentrica sp. nov. se asemeja morfológicamente a Malaxis simillima, de la cual se puede distinguir por tener una hoja por unidad simpodial, los pétalos más cortos, obovados, erectos, paralelos a la columna, el labelo con el margen apical triquetro, agudo, convexo y la cavidad del disco dividida por una costa. Malaxis pittieri se documenta formalmente para la flora de Costa Rica; anteriormente, los ejemplares costarricenses de esta especie se confundían con Malaxis majanthemifolia. Se designa formalmente un lectotipo para Microstylis pittieri.
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.
