Now they don't. Who knows what they looked like 1000 or more years ago? Compare any cross to an F2 of the same cross...you'll find it looks considerably different. So far I know of no F3s , but who knows what that would look like? I think thats why there are like 40 different kuchingensis, etc.i think its a species as no hybrid of fusca x veitchii look like N. hurrelliana
Either way, hurrelliana = stable hybrid population. I think its safe to say its a species now, as eventually you will have to split a "species" off after many many generations of hybridization once it has become its own stable population, but hurrelliana's origins are without a doubt hybrid.