Mini Riccardia

Mini Riccardia (Riccardia chamedryfolia) is a liverwort — not a true moss — that has become one of the most prized miniature aquatic plants in the high-end aquascaping hobby. It consists of tiny, repeatedly branching, dark olive-green thalli that form dense, intricate encrusting mats on stones, wood, and mesh surfaces. Under magnification, each branching thallus is a work of exceptional geometric beauty.

Cultivating Mini Riccardia successfully requires soft, slightly acidic water and CO2 supplementation — it is noticeably more demanding than most mosses and will stagnate or produce algae-prone, open growth without adequate CO2 and micronutrients. In good conditions, however, it grows into a dense, lush carpet of extraordinary fine texture that rivals any moss for visual impact.

Mini Riccardia is particularly popular in nano aquascapes and Iwagumi-style layouts, where it is used to create miniature carpets on stones or as a foreground encrustation that gives the impression of moss-covered boulders in a mountain stream. Its dark coloration contrasts beautifully with light-coloured substrates and pale stones.