Hi Owen, the shape of the flower is of P. lusitanica even it seem very small. Maybe the first flower a little anomalous and the next one will be larger.
For the shape of the leaves, I was more dubious because my plants are more rolled up because grown in full sun like in nature.
But a friend of mine that grow his plants under artificial lights told me that due to the less intensity of his lights, the plants open completly its leaves to catch all the possible lights.
So no doubts, you have a true P. lusitanica