I have been watching my Dendrobium jenkinsii and the Den aggregatum opening spikes this week. To me jenkinsii looks just like a smaller version of Den aggregatum.
First the Dendrobium jenkinsii
The Dendrobium aggregatum has several spikes, the first one is now open and I doubt they all bloom together this year. I don't mind, this way it has a longer blooming season.
And here are both, so you can see the size difference.
