Pterygodium magnum bears leaves that are stem sheathing and erect to spreading. They reduce in size up to the lowest flowers, continuing as bracts among them.
Leaf shape is lanceolate, tapering to the tips. The prominent, pale leaf midrib and margins that curve down are visible in the photo. The leaves are hairless. Leaf size is up to 25 cm by 6 cm (Pooley, 1998; www.africanorchids.dk).