Myoxanthus affinis (Lindl.) C.A.Luer 1982 SUBGENUS Myoxanthus SECTION Myoxanthus Luer 1992

LCDP Photo by G Rojas-Alvarado

Another Flower

Photo by Ecuagenera and their Orchid Website

another Flower

Photo by Orchid Website


Photo by Ecuagenera and their Orchid Website

Plant and Inflorescence

Photo courtesy of Eric Hunt, plant grown by Orquides del Valle, Cali, Colombia


Drawing by Carl Luer


Common Name The Similar Myoxanthus

Flower Size 3/8" [1 cm]

Found in Costa Rica, Colombia, Ecuador, Peru and Bolivia in wet montane forests at elevations of 350 to 2400 meters as a large sized, hot to cold growing epiphyte with stout, erect ramicauls enveloped basally by 5 to 10, long, tubular, hispidous sheaths carrying a single apical, erect, thickly coriaceous, narrowly ovate, acute leaf that is cuneate below into the subpetiolate base that blooms in the winter and spring on a fascile of a few to many, single, simultaneously opening flowers arising from the apex of the ramicaul with the minutely pubescent peduncle being .32" to .6" [8 to 15 mm] long, and infundibular, pubescent, shorter than the ovary floral bracts.

"As indicated by Luer and demonstrated by several of his sketches at SEL, this species is highly variable. The material of M. affinis recently described and illustrated from Costa Rica (Rojas-Alvarado & Karremans 2017) is clearly similar to some of Luer’s drawing of this species, but also similar to some of Luer’s drawings of M. dasyllis (all at SEL). Some differences between the diverse material are evident, with specimens from Costa Rica being morphologically more consistent with the type specimen of Pleurothallis furfuracea than with that M. affinis. It is possible that more than one species is currently treated under the name M. affinis, but with the available information it is impossible to separate these entities. Specimens from the type locality of M. affinis in Peru and M. dasyllis in Ecuador need to be examined carefully, and a thorough study of the variation of this species across its distribution is needed." Rojas-Alvarado, Blanco, & Karremans 2021

Synonyms Humboldtia affinis (Lindl.) Kuntze 1891; Humboldtia rigidifolia (Rchb. f.) Kuntze 1891; Humboltia affinis (Lindl.) Kuntze 1891; Humboltia rigidifolia (Rchb. f.) Kuntze 1891; *Pleurothallis affinis Lindl. 1836; Pleurothallis furfuracea F. Lehm. & Kraenzl. 1899; Pleurothallis rigidifolia Rchb. f. 1855

References W3 Tropicos, Kew Monocot list , IPNI ; Bonplandia Rchb.f 1855 as Pleurothallis rigidifolia;

Selbyana 1: 226 Luer 1975 as Pleurothallis affinis drawing fide; Icones Planetarum Tropicarum plate 211 Dodson 1980 as Pleurothallis affine drawing hmm tepals not long enough; Native Colombian Orchdis Vol 3 COS 1991 photo fide; Icones Pleurothallidinarum Vol IX Systematics of Myoxanthus Luer 1992 drawing fide; Native Ecuadorian Orchids Vol 3 Dodson 2002 photos ok; Orchid Species of Peru Zelenko Bermudez 2009 photo fide; Las Orquideas del Peru Izerskyy & Bezverhov 2011 photo fide; LANKESTERIANA 17(2): G Rojas-Alvarado & Karremans 2017 photo fide; Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 photo fide; Vanishing Beauty, Native Costa Rican Orchids Vol 2 Lacaena to Pteroglossa Pupulin 2020 photo fide; A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae) Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021 photo fide