Oncidium longipes (Lindl. 1850)
Found in Peru, southern Brazil and Paraguay in cool montane forests as well as the lowlands along river banks as a small sized, cool to hot growing epiphyte with oval, elongate psuedobulbs with one or two, apical, linear-oblong, mucronate leaves and blooms with an erect, short to 6" [15 cm] fractiflex, loosely 2 to 6 flowered raceme occuring in the summer through fall. Said to be very similar or conspecific with O. uniflorum. Mount in tree fern or pot with a finer mixture, give hot to cool temperatures, high humidity, bright indirect light and good air circulation. Water often while growing and then less as the pseudobulbs mature for a dry winter rest.
This species has two similar orchid relatives, O uniflorum and O regentii but differs in the larger than 20 cm plant, an inflorescence much shorter than the leaf, large flowers 3.5 cm from dorsal to lateral sepal, a lip that is slightly smaller than the lateral petals, large lateral lobes of the lip in relation to the midlobe, a round isthmus with ciliate margins, a column larger than 5mm a large stigma and a tabula infrastigmata that is longer than wide.
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