Smooth: no obvious surface ornamentation, smooth to touch.

Pleated: the leaf surface is folded longitudinally in pleats (plicate).

Roughened ridges: the leaf surface is irregularly raised into roughened ridges.

Grooved/furrowed/chanelled: the leaf surface has obvious grooves or channels, usually running longitudinally (sulcate).

Warty: the leaf surface has irregular lumps resembling warts (verrucose).

Hairy: the leaf surface is covered with hairs.