SNAIL'S SNACK - free texture pack

(rhyme in the title initially not intended)

a funny looking surface i found outside... i assume some sort of plant in combination with dirt/pollution is the reason for it - but if anyone knows better (or knows which plant), i'd be happy to know!

edit:
thanks to heartfullofhell for clearing things up, check the comments or this link to learn more: en.wikipedia.org/wiki/Radula

these textures are 100% free for you to use but it would be nice if you fav'd it!
of course i'd also be happy to see what you've done with it!
have fun!