It appears to be Anthurium radicans x dressleri. The plant is a hybrid cross and a few years ago was commonly released by tissue culture companies. There was a very large specimen of this cross with blades close to 2 feet tall on display at the International Aroid Society Show and Sale in Miami last weekend.

Here is a link that might be useful: Anthurium radicans x dressleri

Many thanks for the ID. It seems fairly robust. I'll see how it does through the winter. I expect to keep it in my cheapo greenhouse. I have one anthurium, a common one, inside my house and it does rather well. I wonder if this cultivar would be a candidate for overwintering indoors?