Trisetella cordeliae
Luer (1989)

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This one is from Peru where it grows at altitudes of around 1800m.

The leaves are only 3-3,5cm (1 1/4") long, the flowers 2cm (4/5") long and 8mm (1/3") wide.

Best grown mounted in high humidity under intermediate conditions, 14-25°C and watered daily.