You know, that growth might actually not be a blooming one Lol but I do trust SVO's labeling. I would be surprised if they tagged a hybrid as a species? C. walkeriana x loddigesii is C. Heathii, is this something that has happened with walkeriana? Heathii being sold as walkeriana?
If the plant came from SVO, send Fred Clarke an email and ask him. He shares his knowledge very willingly.