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Nardia (order Jungermanniales) A genus of leafy liverworts, which includes N. scalaris, a species common in Britain. The stems are usually more or less prostrate, almost unbranched, often forming extensive patches. The leaves are more crowded towards the tips of the stems. Each leaf is broad, rounded, entire, and somewhat concave. N. scalans is common on gravelly or sandy soils on heaths, moors, mountains, etc.; it is calcifuge.