The sheer beauty and power of Suthin Sukosolvisit’s roots-devouring-rock bonsai is a good example of why Suthin has long been one of our favorite bonsai artists. Over time, roots can virtually swallow rocks, especially with trees as vigorous as this Trident maple, which happens to be the most popular type tree for root-over-rock bonsai. 

No source is given for this colorful 'Seki-joju' Azalea. My best guess is that the tree and photo are originally from Japan; it's not uncommon for Japanese trees to remain unattributed.

 This Trident maple root-over-rock by Wolfgang Putz has to be on my top 100 bonsai photos list (if I had such a list). It originally appeared in a 2014 Bark post.

Here's a brilliant Trident that started as a root-over-rock and slowly morphed into a root-swallowing-rock (like root-devouring-rock, this not an official designation, just an observation). The photo is originally from Kaede Bonsai-en (Kaede is Trident maple in Japanese).

A strange sort of root-over-rock. You might imagine that it started more or less like other root overs, but because the rock is so small, the roots grew under it and pushed it up, while also growing around one side and creating a firm grip on the rock. Though I originally thought the result might simply be a happy accident, upon reflection I think it was the intention of the original artist 40 to 50 years ago... It's just too perfect the way most of the rock, particularly the bowl is left uncovered and even emphasized. Like so many root-over-rock bonsai, the tree is a Trident maple. I borrowed the photo here from Peter Tea’s blog back in August 2012. 

A Robert Steven tree. We’ve shown it before, but it's been a while and it's worth another look.