Propped choke series

From the guard, prop yourself on one elbow in order to feed the cross collar grip.  Drop back to the mat while simultaneously pulling your opponent's elbow on the same side as the cross collar grip away from their body.  Put your foot in the hip in this side and pivot, bringing your other leg across their back.  Cross collar choke by grabbing the fold of the gi opposite your cross collar grip.  You can also transition to straight arm bar, if their elbow remains lateral to your leg.  Since you are leaving the the cross collar grip in place you can choke by placing your opponent in the straight arm bar position and providing counter pressure with the legs.   If their elbow moves medial to your thigh, choke with a reverse triangle, using the cross collar grip to provide pressure with the triangle.