the pale dome moss of NZ's shaded forest floors
- Size
- Height: 5–15 cm
- Lifespan
- 5–15 years
- Diet
- Grows on forest floor, rotting logs, and stream banks in damp, shaded forests. Requires consistent moisture, rich organic soil, and protection from direct sunlight. Prefers well-drained, humus-rich soils with stable moisture levels.
- Habitat
- Grows on forest floor, rotting logs, and stream banks in damp, shaded forests. Forms dense, rounded, pale green cushions like soft domes of velvet.
- Range
- Found throughout the North and South Islands on forest floor, rotting logs, and stream banks in damp, shaded forests. Most common in the North Island and the wetter western regions of the South Island. Also found in Australia and the Pacific.
- Endemism
- Native
- Main Threats
- None significant. This species is common and widespread in damp, shaded forests. Localised threats include forest clearance, stream modification, and climate change reducing forest floor moisture.
- Population
- Not Threatened. Cushion moss is common in damp, shaded forests throughout New Zealand, particularly in the North Island and the wetter western regions of the South Island. It grows on the forest floor, on rotting logs, and on stream banks.
- Conservation Status
- Not Threatened
The one that looks like a soft green pillow has stems that are short and densely packed, forming rounded, dome-shaped cushions that can be 5 to 15 centimetres across. The leaves are pale green to greyish-green, with a whitish, waxy appearance. The cushions are soft and springy, like a velvet cushion or a soft mossy bed. They look inviting. They look comfortable. They look like something you might want to press your hand into or, if you were very tired, lie down on. But they are not yours to squash.
What makes it special is the cushion shape. Cushion moss is one of the most perfectly dome-shaped mosses in New Zealand. Its dense, rounded cushions are a masterpiece of form, each one a perfect hemisphere of pale green velvet. The shape helps the moss retain moisture, the cushion traps water in its interior, keeping the centre damp even when the surface is dry. It is the moss of the soft dome, the one that looks like it was sculpted by a gentle hand, the one that is beautiful and functional at the same time.
The leaves are thick and spongy, made of large, dead, water-holding cells (hyaline cells) surrounded by a network of living, green cells. This structure gives the leaves their pale colour and their soft, spongy texture. The leaves are curved and pointed, overlapping like the scales of a fish. Under a hand lens, the hyaline cells are visible, a network of empty spaces within the leaf.
Biologically, the cushion moss reproduces by spores, released from capsules on short stalks. It grows slowly, a cushion 10 centimetres across may be decades old.
To find cushion moss is to find the soft green dome on the forest floor. It is pale, soft, and inviting, a living cushion on the ground. You will want to touch it. You will want to press your hand into its soft, springy surface. But remember, it is not yours to squash. It is the moss of the soft dome, the one that looks inviting and absolutely is not yours to squash, the one that proves that the most beautiful things are often the most fragile.