Myoxanthus parahybunensis (Barb. Rodr.) Luer 1982 SUBGENUS Myoxanthus SECTION Myoxanthus Luer 1992

Photo by Dalton Holland Baptista


Photo by Eric Hunt, plant grown by the San Francisco Conservatory of Flowers

Part sunCoolTo Hot WinterSpring

Common Name The Covered with Hard Sharp Points Myoxanthus [refers to the pubescence of the sheaths and sepals]

Flower Size 3/8" [1 cm]

Found in Costa Rica, Venezuela, Colombia, Ecuador, Peru and Brazil as a miniature sized, hot to cool growing epiphyte or lithophyte often in full sun at elevations of 300 to 2580 meters with stout, erect ramicauls enveloped by 5 to 8 long, tubular, hispidous sheaths carrying a single, apical, erect, coriaceous, narrowly ovate, acute leaf that is cuneate below into the subpetiolate base that blooms in the winter and spring on a congested fascile of several, single, simultaneous flowers arising from the apex of the ramicaul with minutely pubescent peduncles and infundibular, minutely pubescent, floral bracts.

"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. 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 Myoxanthus neillii but distinguished by flowers up to .4" [10 mm] in diameter vs. .3" [5 mm] and purple margins of the lip vs. greenish." Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021

Synonyms *Anathallis parahybunensis Barb. Rodr. 1882; Humboldtia peduncularis Kuntze 1891; Humboltia peduncularis (Lindl.) Kuntze 1891; Pleurothallis macropus Schltr. 1915; Pleurothallis peduncularis Lindl. 1843;

References W3 Tropicos, Kew Monocot list , IPNI ; Venezuelan Orchids Illustrated Vol 2 Dunsterville & Garay 1961 as Pleurothallis peduncularis drawing fide; AOS Bulletin Vol 36 #9 1967 as Pleurothallis peduncularis; Flora de Venezuela Foldats Volumen XV Part 2 1970 as Pleurothallis exasperatus drawing good; Flora de Venezuela Foldats Volumen XV Part 2 1970 as Pleurothallis peduncularis drawing fide;

Selbyana 1: 260 Luer 1975 as Pleurothallis peduncularis Drawing fide; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 as Pleurothallis peduncularis drawing fide; Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 as Pleurothallis peduncularis drawing fide; Icones Planetarum Tropicarum plate 246 Dodson 1980 as Pleurothallis peduncularis drawing fide; Las Orquedias de El Salvador Vol 3 Hamer 1981 drawing hmm/ photo fide; The Orchids of Surinam Werkhoven 1986 as Pleurothallis peduncularis photo ok; Orchids of Venezuela [An illustrated field guide] Vol. 2 Ramiro and Carnevali 2000 drawing fide; Native Ecuadorian Orchids Vol 3 Dodson 2002 drawing/photo ok; Orquideas Nativas del Tachira Cesar Fernandez 2003 photo ok; Orquideas Da Chapada Diamantina Brito & Cribb 2005; Orchid Species of Peru Zelenko Bermudez 2009 photo fide; LANKESTERIANA 19(2).125 - 193 Ossenbach & Jenny 2019 as Pleurothallis macropus collection sheet fide; Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 photo fide; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 asd M exasperata photo fide; A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae) Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021