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Lepanthopsis kayi (Pleurothallidinae, Orchidaceae), a New Species from Eastern Ecuador

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Xavier Cornejo at Universidad de Guayaquil (UG)
Xavier Cornejo
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Abstract and Figures

Lepanthopsis kayi, a new species from the Amazonas region in Ecuador, is described, illustrated, compared with similar species, and its generic placement discussed. Lepanthopsis kayi is distinguished from all other species in the genus by the combination of ramicauls shorter than the leaf, with glabrous sheaths with the ribs and ostia thickened, and a very congested inflorescence bearing many overlapping, simultaneous flowers arranged in two opposite-facing ranks, the flowers with a proportionally very large, densely pubescent lip, ca. 50 percent longer than the lateral sepals.
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Harvard Papers in Botany
Volume 21, Number 2 December 2016
A Publication of the Harvard University Herbaria Including
The Journal of the Arnold Arboretum
Arnold Arboretum
Botanical Museum
Farlow Herbarium
Gray Herbarium
Oakes Ames Orchid Herbarium
ISSN: 1938-2944
Harvard Papers in Botany
  
 
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  
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Xavier Cornejo and Carmen Ulloa Ulloa
Ternstroemia washikiatii 
  
Lepanthopsis    
      

     

       

we describe a new species of Lepanthopsis  
  
  

Lepanthopsis kayi    sp. nov. 

X.
Cornejo & H. A. Kay 8738

Lepanthopsis kayi is distinguished from all other species
in the genus by the combination of the plant with ramicauls
shorter than the leaf, with glabrous sheaths with the ribs and

      
      


Plant     
Ramicauls       
        Leaf erect
       
     
  Inorescence a suberect to horizontal, very
    
          


       
 oral bracts     
pedicels
   ovary      
   Flowers with sepals and petals translucent
     
sepals
 

petals
lip

    
  
 column     


Eponymy:

Phenology:       

Habitat and ecology: Lepanthopsis kayi is found as an
epiphyte in wet secondary forest, most commonly growing

       
were observed growing on liana stems of Strychnos 
  Philodendron 


Platystele stenostachya  P. ornata Garay,
Lepanthes ximenae  L. deleastes  Dryadella
gnoma Scaphosepalum rapax 
Distribution: 

 Lepanthopsis
LEPANTHOPSIS KAYI 

LISA THOERLE1, 2 AND XAVIER CORNEJO3
Abstract. Lepanthopsis kayi    is described, illustrated, compared with similar
Lepanthopsis kayi is distinguished from all other species in the genus by the combination

 

Keywords:LepanthopsisPlatystele, Pleurothallidinae
         
        


1  
 
 

Harvard Papers in Botany


FIGURE 1. Lepanthopsis kayi AB C D
E
  
kayi are intermediate between those associated with the
genera Lepanthopsis and Platystele .  
          
      
Lepanthopsis by the plant with elongated ramicauls,
usually longer than the leaves, with lepanthiform sheaths
characterized by ciliate or scabrous ribs and ostia, with
        
similarities, a recent assessment of the phylogenetic
relationships within the subtribe Pleurothallidinae places
Platystele is part of the
Specklinia Lepanthopsis, the Lepanthes 

   Lepanthopsis kayi are much shorter

and are clad with glabrous sheaths, but the sheaths of mature
       
with the genus Lepanthopsis.     
        
species of Lepanthopsis, such as L. astrophora 
  
commonly associated with species of Platystele, while
a few species of Platystele display the very congested
      Lepanthopsis
          
cylinder, as in Platystele densiora 
that is more or less umbellate, such as P. dasyglossa 
Platystele 
. L. kayi,

open simultaneously, is characteristic of Lepanthopsis 
Lepanthopsis.

of Lepanthopsis. Platystele hyalina,
the glabrous sheaths of the ramicauls led to its generic
placement, although he noted that the sheaths were ribbed
Lepanthopsis .

Lepanthopsis
is readily differentiated from L. kayi 
 LEPANTHOPSIS 
FIGURE 2. Lepanthopsis kayi in situ
  
 

 
with short ramicauls clad in glabrous sheaths, L. vellozicola
         
        

        


  

FIGURE 3. Lepanthopsis kayi in situ
LITERATURE CITED
KARREMANS, A.  Genera Pleurothallidinarum  
    

KARREMANS, A., F. J. ALBERTAZZI, F. T. BAKKER, D. BOGARÍN, M. C.
M. EURLINGS, A. PRIDGEON, F. PUPULIN, AND B. GRAVENDEEL
Phylogenetic reassessment of Specklinia and its allied genera in

LUER, C. A.Icones Pleurothallidinarum
the genus Platystele . 

  Icones Pleurothallidinarum   
the genus Lepanthopsis. 

MOTA, R. C., F. BARROS, AND J. R. STEHMANN   
 Bulbophyllum carassense
and Lepanthopsis vellozicola. 
STENZEL, H.     Platystele and Pleurothallis
 
Genus-level taxonomical changes in the Lepanthes affinity (Orchidaceae: Pleurothallidinae)
Article
Full-text available
  • Feb 2018
We propose a new classification of the Lepanthes affinity based on previous studies and our ongoing phylogenetic re-evaluation of the Pleurothallidinae. Fourteen genera are recognized as belonging to the affinity. They are found highly supported in a DNA-based phylogenetic inference of combined plastid (matK) and nuclear (nrITS) datasets. The necessary changes, including four novel generic concepts, needed to reorganize the Lepanthes affinity, are proposed here to insure monophyly. The integral discussion on the phylogenetics and biogeography of the group, together with morphological characterization of each clade will be presented in a follow up study.
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Genera Pleurothallidinarum: An updated phylogenetic overview of pleurothallidinae
Article
Full-text available
  • Aug 2016
Subtribe Pleurothallidinae with just over 5000 species is possibly the most species-rich of all orchids. It has been growing steadily for more than two centuries, but the last three decades have been especially active in terms of systematic and phylogenetic studies in the group. The growth in species numbers has been accompanied by the marked increase in generic and infrageneric concepts. Nevertheless, Pleurothallidinae are plagued with cases of convergent and divergent morphology, and phylogenetic relatedness is not always apparent. This opens the door to controversial changes in generic circumscriptions that are considered too inclusive by some and too exclusive by others. A grave consequence of these disagreements is the difficulty of assessing which and how many species actually belong to each genus. Here an attempt is made to place generic names among their close relatives as a first step to re-evaluating the whole subtribe.
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Phylogenetic reassessment of Specklinia and its allied genera in the Pleurothallidinae (Orchidaceae)
Article
Full-text available
  • Aug 2016
The phylogenetic relationships within Specklinia (Pleurothallidinae; Orchidaceae) and related genera are re-evaluated using Bayesian analyses of nrITS and chloroplast matK sequence data of a wide sampling of species. Specklinia is found paraphyletic in the DNA based trees, with species alternatively assigned to Muscarella proven distinct, monophyletic and easily recognizable. Specklinia as such includes about 100 morphologically highly diverse species. Their phenotypic differences have prompted the creation of up to eleven generic names within this relatively small group. Here we show not only that these morphologically divergent species are closely related, but also that they can still be recognized by certain conserved morphological traits. The genera Acostaea, Areldia, Empusella, Cucumeria, Gerardoa, Pseudoctomeria, Sarcinula, Sylphia, Tribulago and Tridelta are found embedded within Specklinia, and therefore reduced under the synonymy of the latter. Specklinia is confirmed as sister to a clade that includes Platystele, Scaphosepalum and Teagueia. Five well-supported subgenera are proposed for Specklinia and are characterized both geographically and morphologically. The species belonging to each subgenus are listed. Incaea is synonymized with Dryadella, while Rubellia is reduced under Platystele. New combinations for several species are proposed. The criteria for the generic delimitation of Specklinia and other genera in the Pleurothallidinae are discussed.
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Two New Species of Orchidaceae from Brazil: Bulbophyllum carassense and Lepanthopsis vellozicola
Article
Full-text available
  • Sep 2009
Duas novas espécies de Orchidaceae, ambas procedentes da Serra do Caraça, Minas Gerais, Brasil, são descritas e ilustradas. Bulbophyllum carassense R. C. Mota, F. Barros & Stehmann é rara e endêmica da Serra do Caraça e do seu entorno, epífita e ocasionalmente rupícola. Tem afinidade com B. bidentatum (Barbosa Rodrigues) Cogniaux, B. filifolium Borba & Smidt e B. plumosum (Barbosa Rodrigues) Cogniaux, todas da seção Xiphizusa (Reichenbach f.) Cogniaux. É apresentada uma tabela comparativa dos caracteres morfológicos de B. carassense e suas espécies relacionadas. A segunda espécie é Lepanthopsis vellozicola R. C. Mota, F. Barros & Stehmann, também rara e endêmica da Serra do Caraça, crescendo exclusivamente como epífita sobre Vellozia compacta Martius, na vegetação de campo rupestre. É a única espécie do gênero a apresentar as seguintes características: caule secundário com dois entrenós evidentes, associados a duas bainhas foliares com margens lisas, e sépalas laterais totalmente conadas. É apresentada uma chave taxonômica artificial para identificação das espécies de Lepanthopsis (Cogniaux) Ames ocorrentes no Brasil.
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New species of Platystele and Pleurothallis (Orchidaceae) from Cuba
Article
  • Aug 2002
Stenzel, H.: New species of Platystele and Pleurothallis (Orchidaceae) from Cuba. — Willdenowia 32: 99–104. 2002. — ISSN 0511968. Two new species of orchids, Platystele hyalina and Pleurothallis oricola, of the subtribe Pleurothallidinae, both discovered recently in Cuba, are described as new to science. The first was found in the eastern part, in the serpentine mountains of Holguín, the latter on the dog-tooth limestone coast of Guanahacabibes, the western tip of the island.
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Although this species shares flowers arrayed in 2 opposite-facing ranks, the inflorescence is lax (vs. very congested) and usually shorter, to 37 mm long, bearing 4-8 flowers (vs. 35-50 mm long, with up to 40 flowers) with a lip much smaller than the completely fused lateral sepals (vs. ca
  • Jan 2009
  • R C Glabrous Sheaths
  • F Mota
  • Mota
glabrous sheaths, L. vellozicola R. C. Mota, F. Barros & Stehmann, was described from a Brazilian collection (Mota et al., 2009). Although this species shares flowers arrayed in 2 opposite-facing ranks, the inflorescence is lax (vs. very congested) and usually shorter, to 37 mm long, bearing 4-8 flowers (vs. 35-50 mm long, with up to 40 flowers) with a lip much smaller than the completely fused lateral sepals (vs. ca. 150 percent of the length of the shallowly connate lateral sepals).