Paul , just came across your questions on G. gracilis today. I too only grow 2 forms of this
species , the one with the narrow ,twisted leaves [not yet in flower here] which I have been growing for at least 40 years, and another with broader leaves which was collected by
Erich Pasche in1995 ,of which he sent me seeds under No.HKEP9510.
Though it is raining at the moment , I took a photo of it to send along. You can see the
vernation of the leaves = it is G. gracilis.
Where did your broadleaved form come from?