Myoxanthus octomerioides (Lindl.) Luer 1982 SUBGENUS Myoxanthus SECTION Myoxanthus Luer 1992

Photo by P Mannen and A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae) Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021

Another Flower

Photo by M Nikirk and Webshots Website

Drawing

Drawing by Carl Luer and The Swiss Orchid Foundation at the Jany Renz Herbaria Website

Common Name The Octomeriae-Like Myoxanthus [refers to it's similarity to Myoxanthus octomeriae = M congestus]

Flower Size .2" [5 mm]

Found in Guerrero and Oaxaca states of Mexico and Belize at elevations around 1700 meters as a small to medium sized, cool growing epiphyte with stout, erect ramicauls enveloped by 4 to 6, hispidulous sheaths and carrying a single, apical, erect, thickly coriaceous, narrowly elliptical, subacute, cuneate below into the conduplicate, subpetiolate base leaf that blooms in the fall on a fascile of .05 to .1" [1 to 2 mm] long, successively single flowered inflorescence arising at the apex of the ramicaul and has sparsely pubescent, floral bracts.

"The habit of this Mexican species is similar to that of Myoxanthus congestus and Myoxanthus pulvinatus in having ramicauls covered by whitish sheaths with scars of fallen trichomes and elliptic leaves. However, M. octomerioides is distinguished by having an ovary and perianth tinged with pink vs. yellowish to whitish and whitish flowers of M. congestus and M. pulvinatus, respectively, and segments of the flowers more oblong and do not open widely vs. segments more ovate that often open widely on the other species. Myoxanthus octomerioides is also similar to the Centro American M. cereus, both with oblong perianth segments that do not open widely, but the first is easily distinguished by its flowers tinged with pink vs. creamy and sessile leaves vs. petiolate leaves." Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021

Synonyms Humboldtia elongata (Klotzsch) Kuntze 1891; Humboldtia octomerioides (Lindl.) Kuntze 1891; Pleurothallis elongata Klotzsch 1853; *Pleurothallis octomerioides Lindl 1837

References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915 as Pleurothallis octomerioides; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Launert 1992 as Pleurothallis octomerioides photo fide; Icones Pleurothallidinarum Vol IX Systematics of Myoxanthus Luer 1992 Icones Pleurothallidinarum Vol XVIII Systematics of Pleurothallis subsection Antenniferae, Longiracemosae, Macrophyllae-racemosae and Subgenera Pseudsostelis and Acuminata Luer 1999 drawing fide; Icones Orchidacearum 10 Plate 1054 Hagsater & Soto 2008 drawing hmm; Diversity of Pleurothallidinae in Guatemala: An Endangered Orchid Subtribe with High Economic and Horticultural Potentials Edgar Mo Mo, Cetzal, Basu and Vega 2017 photo fide; Orchid Genera and Species in Guatemala Archila, Szlachchetko, Chiron, Lipinska, Mystkowska and Bertolini 2018; A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae) Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021 photo fide

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