Leaves (2) 3–12 × (1·5) 2–6 mm., usually with an undulate margin.
Stems up to 25 cm. long, sometimes becoming almost erect.
Styles 4–5, 0·3–0·5 mm. long.
Fruit capsular, 4–5-valved.
Petals 2–3·5 mm. long.
Stamens c. 12.