This species grows in distinctive, bright yellow-green turfs up to 1.5 cm tall. The leaves are usually 1.5 to 2 mm long, and spread away from the stem when moist, but take on a tight spiral twist when dry, making the yellow nerve very conspicuous. Each leaf is parallel-sided for most of its length with a rounded tip from which the nerve protrudes.

Barbula convoluta and Barbula sardoa.

This is a plant of neutral or base-rich, disturbed and open habitats such as the edges of paths, gardens, fields and old walls.

All year round.

It is common throughout Britain and Ireland.

Common in Leicestershire and Rutland.