Orchidaceae
Psygmorchis
Kingdom: Plantae Rank: Genus Parent: Orchidaceae Status: Valid
Morphological Description
Diagnosis:
##
1 Callus 4-lobed with each lobe ending in an erect boss of finger-like appendages. .................. P. glossomystax
1’ Callus not distinctly lobed, with smooth edges lacking appendages. ................................... P. pusilla
Vegetative Morphology
Habit: Ephemeral twig epiphytes producing fan-shaped growths.
Leaves: Leaves equitant, with imbricating bases.
Reproductive Morphology
Inflorescence: Inflorescences axillary, scapose, just surpassing the leaves, few-flowered in succession.
Flowers: Flowers yellow. Dorsal sepal and petals free, the lateral sepals shortly fused at the base. Lip three-lobed, the midlobe variously lobulate, with a prominent lobed callus. Column erect, with prominent wings; pollinia 2, sulcate, on a common stipe and minute viscidium.
Other
Notes: Psygmorchis is a distinct genus of twig-epiphytes that was once included in a broadly defined Oncidium. Recently, based on molecular data, the genus has been submerged into Erycina ##, an otherwise Central American genus. A conservative treatment is accepted here.