Abstract
A new species of Pleurothallis from the Western Andes of Colombia is described and illustrated. The new species belongs to subsection Acroniae of the series Amphigyae, morphologically resembles Pleurothallis amphigya, but differs mainly by the ovate-lanceolate lip, with two divergent, elongate keels, located at the base up to about the middle of the lip (vs. triangular trilobed, the disc with a developed glenion at the base).
References
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Brown, R. (1813) Clasis XX. Gynandria-Monandria. <em>Hortus Kewensis</em>; <em>or, a Catalogue of the Plants Cultivated in the Royal Botanic Garden at Kew </em>5: 188–220.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Doucette, A., Wilson, M., Portilla, J., Kay, A., Moreno, J.S. & Cameron, K.M. (2016) Two new species of <em>Pleurothallis</em> and a new name for <em>Acronia rinkei. Orquideología</em> 33: 123–139.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Guimarāes, P.J.M. & Michelangeli, M.A. (2019) Systematics of <em>Tibouchina</em> and allies (Melastomataceae: Melastomateae): A new taxonomic classification. <em>Taxon </em>68: 937–1002. https://doi.org/10.1002/tax.12151 </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Humboldt, F.H.A. & Bonpland, A.J.A. (1808) <em>Monographie des Melastomatacées, Rhexies</em>. De L’imprerie de J. Smith, Paris, 160 pp. </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Jiménez, M., Ocupa Horna, L. & Vélez-Abarca, L. (2021) Anew species of Pleurothallis (Orchidaceae: Pleurothallidinae) from Zamora in the Province of Zamora Chinchipe, Ecuador. <em>Phytotaxa</em> 518: 79–86. https://doi.org/10.11646/phytotaxa.518.1.11</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Karremans, A.P., Rodriìguez-Martiìnez, L. & Rincoìn-Useche, C. (2017) Four new species of <em>Pleurothallis</em> (Orchidaceae: Pleurothallidinae) from The Valle del Cauca Department in Colombia. <em>Lankesteriana</em> 17: 251–260. https://doi.org/10.15517/lank.v17i2.30155</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Karremans, A.P. & Vieira-Uribe, S. (2020) <em>Pleurothallids: Neotropical jewels</em>, vol I. Mariscal, Quito, 320 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. & Escobar, R.R. (1981) Miscellaneous new species in the Pleurothallidinae (Orchidaceae). <em>Orquideología</em> 14: 114–187. https://doi.org/10.5962/bhl.part.15137</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. (1986) Icones pleurothallidinarum III. Systematics of the genus <em>Pleurothallis</em> (Orchidaceae). <em>Monographs in Systematic Botany from the Missouri Botanical Garden</em> 20: 1–108.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. (1998) Icones Pleurothallidinarum XVII: Subgenus <em>Pleurothallis</em> (Orchidaceae). <em>Monographs in Systematic Botany from the Missouri Botanical Garden</em> 72: 1–63.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. (2012) Miscellaneous new species in the Pleurothallidinae (Orchidaceae). <em>Harvard Papers in Botany </em>17: 333–368. https://doi.org/10.3100/025.017.0214 </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Rodriìguez-Martiìnez, L., Rincoìn-Useche, C. & Karremans, A.P. (2015) A New <em>Pleurothallis</em> from Colombia, with a Note on <em>Ancipitia</em> and <em>Colombiana</em> (Orchidaceae: Pleurothallidinae). <em>Systematic Botany</em> 40: 75–78. https://doi.org/10.1600/036364415X686350</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Shaw, J.M.H. (2016) Quarterly supplement to the international register and checklist of orchid hybrids (Sander´s List), January – March 2016 Registrations. <em>The Orchid Review </em>124: 1–40.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sierra-Ariza, M.A., Rincón-González, M., Wilson, M. & Villanueva, B. (2022) Una nueva especie de <em>Pleurothallis </em>(Pleurothallidinae) subsección <em>Macrophyllae-Fasiculatae </em>para la región Andina Colombiana. <em>Lankesteriana </em>22: 25–35. https://doi.org/10.15517/lank.v22i1.50823</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Vélez-Abarca, L., Jiménez, M.M., GutiérreZ, D. & Baquero, L.E. (2022) <em>Pleurothallis ariana-dayanae, a new species in subsection Macrophyllae-Fasiculatae </em>(Pleurothallidinae) from the Cordillera del Condor, Ecuador. <em>Lankesteriana </em>22: 101–109. https://doi.org/10.15517/lank.v22i2.51750 </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Doucette, A., Wilson, M., Portilla, J., Kay, A., Moreno, J.S. & Cameron, K.M. (2016) Two new species of <em>Pleurothallis</em> and a new name for <em>Acronia rinkei. Orquideología</em> 33: 123–139.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Guimarāes, P.J.M. & Michelangeli, M.A. (2019) Systematics of <em>Tibouchina</em> and allies (Melastomataceae: Melastomateae): A new taxonomic classification. <em>Taxon </em>68: 937–1002. https://doi.org/10.1002/tax.12151 </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Humboldt, F.H.A. & Bonpland, A.J.A. (1808) <em>Monographie des Melastomatacées, Rhexies</em>. De L’imprerie de J. Smith, Paris, 160 pp. </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Jiménez, M., Ocupa Horna, L. & Vélez-Abarca, L. (2021) Anew species of Pleurothallis (Orchidaceae: Pleurothallidinae) from Zamora in the Province of Zamora Chinchipe, Ecuador. <em>Phytotaxa</em> 518: 79–86. https://doi.org/10.11646/phytotaxa.518.1.11</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Karremans, A.P., Rodriìguez-Martiìnez, L. & Rincoìn-Useche, C. (2017) Four new species of <em>Pleurothallis</em> (Orchidaceae: Pleurothallidinae) from The Valle del Cauca Department in Colombia. <em>Lankesteriana</em> 17: 251–260. https://doi.org/10.15517/lank.v17i2.30155</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Karremans, A.P. & Vieira-Uribe, S. (2020) <em>Pleurothallids: Neotropical jewels</em>, vol I. Mariscal, Quito, 320 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. & Escobar, R.R. (1981) Miscellaneous new species in the Pleurothallidinae (Orchidaceae). <em>Orquideología</em> 14: 114–187. https://doi.org/10.5962/bhl.part.15137</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. (1986) Icones pleurothallidinarum III. Systematics of the genus <em>Pleurothallis</em> (Orchidaceae). <em>Monographs in Systematic Botany from the Missouri Botanical Garden</em> 20: 1–108.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. (1998) Icones Pleurothallidinarum XVII: Subgenus <em>Pleurothallis</em> (Orchidaceae). <em>Monographs in Systematic Botany from the Missouri Botanical Garden</em> 72: 1–63.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Luer, C.A. (2012) Miscellaneous new species in the Pleurothallidinae (Orchidaceae). <em>Harvard Papers in Botany </em>17: 333–368. https://doi.org/10.3100/025.017.0214 </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Rodriìguez-Martiìnez, L., Rincoìn-Useche, C. & Karremans, A.P. (2015) A New <em>Pleurothallis</em> from Colombia, with a Note on <em>Ancipitia</em> and <em>Colombiana</em> (Orchidaceae: Pleurothallidinae). <em>Systematic Botany</em> 40: 75–78. https://doi.org/10.1600/036364415X686350</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Shaw, J.M.H. (2016) Quarterly supplement to the international register and checklist of orchid hybrids (Sander´s List), January – March 2016 Registrations. <em>The Orchid Review </em>124: 1–40.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sierra-Ariza, M.A., Rincón-González, M., Wilson, M. & Villanueva, B. (2022) Una nueva especie de <em>Pleurothallis </em>(Pleurothallidinae) subsección <em>Macrophyllae-Fasiculatae </em>para la región Andina Colombiana. <em>Lankesteriana </em>22: 25–35. https://doi.org/10.15517/lank.v22i1.50823</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Vélez-Abarca, L., Jiménez, M.M., GutiérreZ, D. & Baquero, L.E. (2022) <em>Pleurothallis ariana-dayanae, a new species in subsection Macrophyllae-Fasiculatae </em>(Pleurothallidinae) from the Cordillera del Condor, Ecuador. <em>Lankesteriana </em>22: 101–109. https://doi.org/10.15517/lank.v22i2.51750 </span></span></span></p>