Mniaceae

Pearl Moss

Plagiomnium affine

One of several mosses sold as pearl moss, and a true moss rather than a liverwort: its rounded leaves have a clear midrib running to the tip, which the liverworts never have.
Light
medium–high
Difficulty
medium

Tank conditions

Plant type
moss
Growth rate
very slow
Tolerates light
medium – high
Placement
on stone and wood
Propagation
division, daughter plants
Grows emersed
yes

Care and keeping

Appearance

Rounded leaves with a distinct midrib on shoots that creep or arch over. That midrib is the way to tell it from the liverworts sold under the same trade name.

Keeping

It grows both above water and submerged, and takes a wide range of light. Like every moss it is tied to wood or stone until it grips, and it collects debris in still water, so some flow suits it.

Placement

Tied to wood and stone, in nano tanks and at the front of larger layouts.

Propagation

By division: pull a clump apart and anchor the pieces.

Cultivars

The same plant with a different look: light, water and care are shared with the species.

Other varieties: Plagiomnium cf. affine, Plagiomnium cf affine, Plagiomnium cf affine in Vitro

Scientific and other names, conservation status

Other scientific names
Astrophyllum cuspidatum, Bryum aciphyllum, Bryum affine, Bryum ligulatum cuspidatum, Mnium affine, Mnium affine dentatum, Mnium affine ilicifolium, Mnium affine intermedium, Mnium cuspidatum, Mnium cuspidatum affine, Mnium insigne intermedium, Orthomnion affine, Polla affinis
Family
Mniaceae