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Oncidium isthmi Narrow Oncidium


Narrow Oncidium, Oncidium isthmii


Oncidium isthmi Schltr. 1922 SECTION Oblongata Photos courtesy of Lourens Grobler

Faint,  Fragrance, Part shade, Hot to Cool Fall

Common Name The Narrow Oncidium [refers to the narrow mid lip]

Flower Size 1" [2.5 cm]

Found in Panama and Costa Rica in lowland tropical rainforests at elevations of sealevel to 1500 meters, as a medium size, hot to cool growing epiphyte with clusters of compressed, ridged, oblong-ovoid pseudobulbs subtended by foliaceous bracts . The 2, long, acute, elliptic-lanceolate leaves are carried at the top of the pseudobulb. The erect to arching, 4' [120 cm] long, branching panicle with to 20, short, spreading branches each carrying 3 to 7 flowers and arises from a mature pseudobulb that bears many, faintly scented, yellow flowers with brown markings. The orchid blooms in the fall on a long paniculate, many flowered inflorescence with scarious bracts, under cool to hot conditions as it is found at elevations of sea level to 1500 meters, needs year round watering, with a slight reduction in winter.