Yep, my giant White Birds get 25ft. tall and the leaves can be 6 or 7ft. long by 2ft. wide. So it does depend upon what variety he's talking about.
That's the great, and sad truth about books nowadays. New information is so quickly available through internet sources now that a book can be out of date before it even gets published. An author can't be expected to list every variety of plant, much less keep up with ongoing research.
Orchid books are out of date nearly weekly now and it's a real shame. The orchid botanists are re-categorizing and renaming many types of orchids as they research them on a cellular level. Almost any orchid you buy has a new name waiting for it when you research its parentage.
