Oncidium flowering mechanism

[mascia]

Hi everyone,
With cattleyas what I have noticed so far is that if a new growth starts from a mature pseudobulb which has not flowered, chances are this pseudobulb will not flower ever (please correct me if I'm wrong).

Is this true for oncidiums as well? I'm asking because I have a couple Oncidium flexuosum that, after their last flowering, have created 3 to 5 new bulbs each, but none of these bulbs created spikes.

It is a native species here that blooms in early spring. Once spring comes will it only bloom from the latest bulb or from all the bulbs it created during the past year?