This is a non-curly kale that's claimed to grow very tall - 17' is the
record and they make walking sticks out of the stems on Jersey.

Mine has grown to about 5' and I've started eating it. It has a lot of
young leaves and the trick is to harvest them at about 4" long and steam
them for about 5 minutes. The result is something that's got a strong
but not bitter cabbage taste.

Worth growing as an edible novelty. Caution: If your grows much bigger
than mine, you'll need a step ladder to harvest it!

Steve Harris - Cheltenham - Real address steve AT netservs DOT com