Myoxanthus panamensis Rojas-Alv. & Karremans 2021 SUBGENUS Myoxanthus SECTION Scandentia Luer 1992

TYPE Drawing

Photo by L. Nauheimer/TYPE Drawing [originally M scandens Figure 34 Luer 1992] by Carl Luer and A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae) Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021

Common Name The Panama Myoxanthus

Flower Size .12" [3 mm]

Found in Panama in wet ropical forests at elevations of 50 to 600 meters as a medium sized, hot to warm growing epiphyte with cylindrial, flexible ramicauls producing up to 6, prolific stems at the apex enveloped by tubular, hispidous, acute, rust colored, imbricate sheaths and carrying narrowly ovate to lienar, conduplicate, acute, narrowly cuneate below into the subpetiolate base leaf that blooms at most any time of the year on a reduced peduncle, enclosed during early development by a .12" [3 mm] long spathe that frequently disintegrates when old, producing single-flowered inflorescences in succession. Pseudopeduncle .12 to .16" [3 to 4 mm] long, whitish with minute trichomes, subtended by a .04 to .1" [1.0 to 2.5 mm] long bract with trichomes to the apex, with as long as the pedicel floral bracts.

"Plants of this species are almost indistinguishable from the prolific Myoxanthus sotoanus and Myoxanthus scandens , with which this species has been confused. However, M. panamense can be distinguished by its greenish translucent sepals vs. purple in M. scandens, brownish in M. sotoanus, petals transluscent greenish vs. purple stripped in M. scandens and translucent yellow in M. sotoanus and column sometimes suffused with purple vs. column yellowish green in the others. The lip is similar to that of M. scandens but differs in having a bilobed short, convergent small basal callus and disc with a longitudinal pair of rounded calli from near the base to near the apex vs. a small callus at the base becoming a pair of conspicuous longitudinal lamellae near the apex where the lamellae becomes frequently irregular. The lip of M. panamense is easily distinguished from that of M. sotoanus because in the former it is purple and weakly trilobed with obtusely angled lateral lobes vs. yellow and conspicuously trilobed with ovate and oblique lateral lobes." Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021

Synonyms

References W3 Tropicos, Kew Monocot list , IPNI ;

Pleurothallids Neotropical Jewels Vol 1 Karremans & Viera 2020 photo fide; * A taxonomic synopsis and morphological characterization of Myoxanthus (Orchidaceae: Pleurothallidinae) Gustavo Rojas-Alvarado, Mario A. Blanco, A. P. Karremans 2021 Drawing/photo fide

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