Ivy is harvest-able, it has the properties:

• Fortify Enchanting
• Slow
• Damage Stamina
• Resist Frost
  

it takes 10 days to grow back, and each size gives a different amount of leaves.  The leaf item model is shitty but I'm terrible at modeling NIFs.

There are approximately 75 vanilla Skyrim locations to harvest ivy from, lots of them are in riverwood if you want to try it out.