This is the 2nd time it flowered. A very slow grower. Not only it is a very slow grower, from budding to blooming takes about 3 months (which is slow for a Paph species).
Very nice.Hook x volonteanum is an often seen cross, hook has rounder form but volonteanum has darker colour , aim could be round dark flower.I only have 2 pure volonteanums, one is in spike, as Xavier said,with dark, narrower, straight hard leaves.