The cutting that I purchased as D. oiantha has much more elongated leaves than D. geri so I would have to say that they appear to be different in my mind. See Photos below:

Dischidia oiantha

Dischidia geri
The cutting that I purchased as D. oiantha has much more elongated leaves than D. geri so I would have to say that they appear to be different in my mind. See Photos below:
Dischidia oiantha
Dischidia geri
Dischidia oiantha has the typical very small flowers of the Dischidia genus, which are difficult to photograph well.
I find that with most Dischidia you can get away with growing them in nothing but sphagnum moss for a long time. Dischidia oiantha was no different and exploded in growth growing in sphagnum.
Dischidia oiantha is endemic to the Philippines where it was described by Rudolf Schlechter in 1904.
Looking around the other day, I noticed that there were a couple of Dischidia that I have kept over the years that never made it to this website so I thought that I would take the time now while it is relatively slow to remedy the situation. We will begin talking about Dischidia oiantha starting tomorrow.
I hope that September 2021 is a great one for everyone that reads this blog! Here is the final flower of Hoya undulata for 2021, and with the difficulty in growing this one, it could be the last photo for this species take by me ever!
Look how beautiful the backs of the flowers look with all of the magenta spots on this plant.
The wavy leaved original clone that has just flowered has much more color in the yellow/orange spectrum than the mostly ivory colored blooms of the smooth edged clone. It also appears that the coronal lobes are wider as well on the wavy edged clone.
I will be the first to admit that my plant looks terrible, but we will celebrate its opening of nine flowers over the next few days.
I am going to have much more on this plant when the peduncles that are full of buds open. These flowers are just sort of a teaser for now: