We received a CBR this week at the Philadelphia Judging Center for our Bulbophyllum caudatisepalum. I understand that the SITF measurement form was submitted by the juding center, however I wanted to add a photo which may aid in identification. To the best of my understanding the main difference between B. flavescens and B. caudatisepalum is that caudatisepalum posses a bract or sheath that envelops the pseudobulb, leaf base and the base of the inflorescence. The attaced picture is a picture of the bract/sheath covering the pseudobulb and inflorescence on our plant. There is also a picture from the Swiss Orchid Foundation which may help as well.
Thanks!
Zach Wummer
Bulb. caudatisepalum, award 20122216, has been confirmed to be Bulbophyllum flavescens by SITF(March 2012) with assistance of Leslie Garay.  Â