Cryptocoryne nevellii AKA Neville
Meet Neville, he is a small unassuming crypt with big ambition, he doesn't want to grow tall, he doesn't want to take over the world, instead he wants to spread across the floor of your tank one runner at a time. Give Neville a chance in your tank.
This Cryptocoryne has a quick growth rate when settled. Planting it in groups allows this species to form a dense carpet.