African Orchid - can anyone name it ?

[nenella]

I have been given a division of this by my mother who has had the plant for over 30 years ..(from Kenya)
The flowers are small & yellow (many flowers per bract). She tells me they look similar in shape to the flowers of the Doum Palm and are yellow.
Here is a photo of the plant as well as my division freshly mounted on a bit of drift wood. I hope someone can identify this.