Its stems are roughly circular in cross section, covered with dense white intertwined hairs.

The sessile, opposite and entire leaves are 7–22 mm long by 2–4 mm wide, with upper surfaces which are wrinkled and pubescent and lower surfaces grey (covered in dense intertwined hairs).

The flower stalks are 2–4.5 mm long, and have both dendritic and peltate scale hairs.

The calyx has five lobes (3–4 mm long)which are free almost to their bases.

The white or pale mauve corolla is 5–7 mm long.