Riccardia chamedryfolia (Coral Moss)

02 November 2026

Riccardia chamedryfolia is a compact, branching liverwort commonly sold in aquascaping as coral moss or mini pellia. It forms dense, cushion-like green growth with a finely divided, coral-like texture. This identification follows the supplied source label, although commercial liverwort names can sometimes be applied inconsistently. It is best used attached to hardscape rather than planted deeply in substrate, where good water movement and stable conditions help maintain healthy growth.

Identification

This plant is identified here as Riccardia chamedryfolia, a small thalloid liverwort rather than a true moss. Its flattened, repeatedly branched thalli create a compact, irregular surface resembling miniature coral. Aquarium specimens may vary in color from light green to deep green depending on light, nutrition and growing conditions. The supplied commercial label is the basis for the identification, so closely related or mislabelled Riccardia should not be ruled out.

Placement and attachment

Attach small portions to rocks, wood or other stable hardscape using thread, fine mesh or a small amount of aquarium-safe cyanoacrylate gel. Keep the layer thin: thick clumps can trap debris and detach from the surface. It is not normally used as a conventional rooted foreground plant. Place it where gentle flow can pass through the growth without blasting it loose.

Cultivation

Provide moderate light, consistent water quality and regular access to dissolved nutrients. Carbon dioxide supplementation generally improves density and growth, although the plant can persist without it under suitable conditions. Avoid sudden changes in temperature, chemistry or water level. Gentle circulation is useful because debris lodged in the finely branched growth can encourage algae and decay.

Trimming and propagation

Trim overgrown cushions with clean scissors and remove loose fragments so they do not settle in unwanted areas. Propagation is usually achieved by dividing healthy portions and reattaching them to new hardscape. Slow growth means that shaping should be gradual. Inspect dense clumps during maintenance and remove shaded, deteriorating material before it affects the remaining growth.

Plant info

Colors: Green, Dark green, Light green
Difficulty: Advanced
Usage: On rock or root
Type: Thalloid liverwort
Growth rate: Slow
Height: 1-5 cm
Light demand: Medium
CO2: Medium

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