This very photogenic orchid is Oncidium excavatum, a terrestrial species found in Peru and Ecuador where it grows on steep banks from 2400 to 2800m altitude in cool forest. Like many of the terrestrial oncidiums it has long upright flower spikes to present the flowers above surrounding vegetation and the flowers are clustered near the top of the branched spikes. This gives a flowering plant great impact.
We have grown the species in pots and baskets in both our cool Americas and warm americas sections and conclude that for us it grows best in Warm Americas (minimum 15C) in good light and in baskets with plants watered throughout the year. Flowering reliably happens in the autumn and the long lasting flowers will still be with us into December.
You will have a chance to see it again in December as we are planning a virtual Christmas Orchid Festival on Thursday Dec 3rd from 6.30 to 7.30 with a click and collect opportunity to pick up Christmas orchids the following weekend (lockdowns permitting)