I received this very informative and thorough tea poster recently, a gift from a colleague. It's perfect for a tea geek like me! The poster is produced by Pop Chart Lab. Whomever pulled together the content has a depth of tea knowledge. I was pleased to find the "Dark Tea" category present. In that category, it includes Pu-Erh and other more obscure teas. I was a little surprised to see Rooibos on the list (and not called out as "herbal"), but I think that's a testament to the popularity of this tisane.
Here's the description from the website, "Placed into 7 taxonomical boxes - with compartments for Black, Green, Dark, Oolong, White, Rooibos and Yellow - and further classified by country of origin, this spot-on selection features 104 tea types in all, from Darjeeling to Early Grey to the full complement of famous Chinese leaves."
It's a useful study aid and I'm grateful to have a limited print (#08/500). The poster even came with unrolling instructions! It's hanging in my cube at work and I've even used it for a few tea educational discussions.