This was originally sold to me labelled D. crepidiferum. Jay's site calls it glomeratum, and I've also seen it labelled D. sulawesii. As far as I can see, the only real difference is that this plant is bigger than most, about 3 feet tall, and grows straight upright, never horizontally or pendant. Amazing flowers, whatever you call it.
Another pair of inflorescences showing buds ready to open - they don't turn pink until they're open.