Myoxanthus parahybunensis (Barb.Rodr.) Luer (1982a: 47)

Rojas-Alvarado, Gustavo, Blanco, Mario A. & Karremans, Adam P., 2021, A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae), Phytotaxa 507 (3), pp. 211-258 : 244

publication ID	https://doi.org/10.11646/phytotaxa.507.3.1
DOI	https://doi.org/10.5281/zenodo.5484827
persistent identifier	https://treatment.plazi.org/id/0E3EF64D-FF86-8535-FF26-FD68FCFAFA54
treatment provided by	Marcus (2021-08-31 07:38:10, last updated by Plazi 2023-11-06 08:45:43)
scientific name	Myoxanthus parahybunensis (Barb.Rodr.) Luer (1982a: 47)
status

Treatment

36. Myoxanthus parahybunensis (Barb.Rodr.) Luer (1982a: 47) View in CoL . (Fig. 17B,C)

Basionym: Anathallis parahybunensis Barbosa Rodrigues (1882: 76) View in CoL .

TYPE:— BRAZIL. Minas Gerais: in trees along the River Parahybuna, 680 m, Barbosa Rodrigues s.n. (holotype: lost, lectotype selected in Rojas-Alvarado & Karremans 2020, tab. 150, in Iconogr. Orchid. Bresil, vol. 3, at the Library of Rio de Janeiro Botanical Garden, cited as tab. 789 [(unpublished) in Barbosa Rodrigues (1882: 76); copied and reproduced in black and white in Cogniaux [1896: tab. 111, fig. II, 1896]; reproduced in colour in Sprunger et al. (1996, vol. 1: 208).

Heterotypic synonoyms: Pleurothallis peduncularis Lindley (1843: 47) , nom. illeg. hom. non Hook. 1841. Humboltia peduncularis Kuntze (1891: 668) , as “ Humboldtia ”, replacement name. Specklinia peduncularis Barros (1983 [1984]: 110), nom. illeg. TYPE:— BRAZIL. Without locality, imported from Rio de Janeiro by Messrs. Loddiges (holotype, K!).

Pleurothallis macropus Schlechter (1915: 130) View in CoL .

TYPE:— ECUADOR. San Nicolas : Río Pilaton, flowered in June 1886, Sodiro 30 [actually Luis Sodiro] (holotype: BR!; isotype, P!).

Distribution:— Costa Rica, Venezuela, Colombia, Ecuador, Peru and Brazil.

Notes:— Myoxanthus parahybunensis is the oldest available name for the taxon commonly referred to as M. exasperatus , a name that has been misapplied ( Rojas-Alvarado & Karremans 2020, see Myoxanthus exasperatus discussion). Since Pleurothallis peduncularis Lindl. is illegitimate (according to Art. 58.1, Ex. 1 of the International Code of Nomenclature, Turland et al. 2018), the name must be cited as Humboltia peduncularis Kuntze.

Myoxanthus parahybunensis is recognized by its caespitose habit, ramicauls with few trichomes covering only the basal sheath of the ramicaul, other ramicaul sheaths smooth without trichomes or scars, flowers yellowish and whitish with sepals and petals narrowly elongate, the column not toothed but with purple wings and lip subpandurate with purple margins. Myoxanthus parahybunensis is similar to M. neilli but distinguished by flowers up to 10 mm in diameter vs. 5 mm and purple margins of the lip vs. greenish.

References

Cogniaux, A. (1896) Orchidaceae. In: Martius, C. F. P., Eichler, A. G. & Urban, I. (Eds.) Flora Brasiliensis 3. Regia, Munich, 672 pp.

Kuntze, O. (1891) Revisio generum plantarum, 2. Felix, Leipzig, 1011 pp.

Luer, C. A. (1982 a) A reevaluation of the genus Myoxanthus (Orchidaceae). Selbyana 7: 34 - 54. https: // doi. org / 10.5962 / bhl. part. 14425

Rojas-Alvarado, G. & Karremans, A. P. (2020) Revision of the Costa Rican species of Myoxanthus (Pleurothallidinae: Orchidaceae). Phytotaxa 448: 1 - 70. https: // doi. org / 10.11646 / phytotaxa. 448.1.1

Sprunger, S., Cribb, P. & Toscano de Brito, A. (1996) Joao Barbosa Rodrigues Iconographie des Orchidees du Bresil. Reinhardt, Basel.

Turland, N. J., Wiersema, J. H., Barrie, F. R., Greuter, W., Hawksworth, D. L., Herendeen, P. S., Knapp, S., Kusber, W. H., Li, D. Z., Marhold, K., May, T. W., McNeill, J., Monro, A. M., Prado, J., Price, M. J. & Smith, G. F. (Eds.) (2018) International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum vegetabile 159. Koeltz, Glashutten. https: // doi. org / 10.12705 / Code. 2018

Abbreviations

K	Royal Botanic Gardens
BR	Embrapa Agrobiology Diazothrophic Microbial Culture Collection
P	Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants